FVWM, (see also related wikipedia entry) is an historic, mature, extremely powerful and configurable (and relatively hard to master) window manager for X. The modern FVWM 2.x branch which you can find in most distributions' repos, diverges significantly from the 1.x line, which was forked from OpenBSD long ago and can still found in its base alongside cwm; therefore the configuration below would require a massive reshape in order to adapt to OBSD's native FVWM (fvwm2 is found in OBSD's ports too).

I discovered FVWM a couple of years ago thanks to ILUXA's post on FreeBSD Forums and it raised my curiosity. At first it looked 'hostile' at best, configs available online were often outdated, hard to understand without a background knowledge, while the excellent official fvwm documentation was too extensive to be grasped at once.
As I kept retrying on and off with no particular dedication, reading mans and still screwing up my config, I found myself having an intermediate understanding of its inner and design within a couple of months.
Since then, FVWM has become my favourite window manager together with IceWM and Fluxbox.

So why FVWM? FVWM basically allows the user to build his/her own lightweight DE (with ICCCM and EWMH compliance) without having to actually write one, by providing a high-level abstraction for all common WM aspects, features and behaviour. The Function + Bindings system lets you control almost every single aspect of window management, decoration are completely hackable (it's quite easy to reproduce any wm theme) and several modules (FvwmPager, FvwmButtons, FvwmTaskBar, FvwmAnimate, FvwmEvent...) allows creating docks, panels, wokspace manager, icons, animations, launchers, setting wallpaper, as well as toggle transparency and control WM events. This modularity is also the key of FVWM lightweight: users enables only what it's defined in the config.

On the other hand, the default FVWM config is extremely barebones, oldish and anti-intuitive. This was enough to drive most users away in early '00s (same fate as AfterStep), no sooner had GTK+ DEs become stable.

Below my personal lightweight FVWM config , which uses built-in Mwm style emulation, with, again, my beloved CDE Solaris crymson+dimgrey color scheme, a single FvwmButtons Dock and FvwmPager. The Functions are designed to reproduce most common features and the functionalities of popular WMs (stacking, opaque moving, floating, tiling, dynamic focus change, any-border resize, iconify/maximize, fullscreen, alt-tab switch, window-grab ops, keyboard accelerators, move/go-to workspaces, etc...) . Some Icons/pixmaps come from those already shipped with FVWM, some others from WindowMaker and GNUStep, but I created several more too, all available here https://svn.riouxsvn.com/sehnsucht_dots/fvwm/pixmaps/.

How it works

Most of my options can be easily interpreted by looking up for the fvwm(1) man page. Nonetheless, functions and bindings can prove quite hard to get at first, so I'll first present you with a quick recap, which should also allow new users to adjust it to their preference. My config assumes a mouse with lateral buttons, so replace button 8 with 2 (middle wheel press) in case you don't have one

#=========== Functions Syntax
   +  I = Immediately
    + C = Single Click
    + D = Double Click
    + H = Hover
    + M = Motion, AKA Click and Drag

#======== Syntax and Buttons/Windows/Mods/Mouse IDs for Bindings 

# Default Binding Syntax
 Key 	{(window)} [key] 	[Context] 	[Modifier] 	[Action]
 Mouse  {(window)} [button] 	[Context] 	[Modifier] 	[Action]

  Button: 0=any, 1, 2 or 3
  |       Context: R=RootWdw,  W=AppsWdw, T=TitleBar, S=Sides
  |       |        F=Frame (corners), I=IconWindow, 0-9=WindowButtons
  |       |        
  |       |       Modifiers: None,Control,Shift,Meta,Any,4=hyper
  |       |       |       Function
  +------ +------ +------ +-------



#  Window Buttons and Window ID
+--------------------------------------------------------+
|        Root Window                                     |
| Icon                                                   |
|                                                        |
| F------------------------S--------------------------F| |
| | 1 3 5 7 9         Title Bar (T)      0  8  6  4  2 | |
| +----------------------------------------------------+ |
| |                                                    | |
| S                        W                           S |
| |                                                    | |
| F------------------------S--------------------------F  |
|                                                        |

# Contexts:
    R = Root Window
    W = Application Window (anywhere inside borders)
    F = Frame Corners
    S = Frame Sides
    T = Title Bar
    I = Icon (Iconified in the IconBox) 
    A = Anywhere         

# Valid Modifiers
    N = None
    C = Control
    S = Shift
    M = Meta (Alt)
    4 = Hyper (Start/Win Key)
    L = Caps Lock
    A = Any modifier


# Mouse Buttons Numbering

1 = left button
2 = middle button (pressing the scroll wheel)
3 = right button
4 = turn scroll wheel up
5 = turn scroll wheel down
6 = push scroll wheel left
7 = push scroll wheel right
8 = 4th button (aka browser backward button)
9 = 5th button (aka browser forward button)

My annotated ~/.fvwm/config

##############################################################################
#
#                                                                             
# Global Settings                                               
#                                                                             
#
##############################################################################

ImagePath $[FVWM_DATADIR]/pixmaps:$[HOME]/.fvwm/icons:$[HOME]/.fvwm/pixmaps
ClickTime 	250
DeskTopSize 	2x2
DesktopName    	0 FVWM Desktop
OpaqueMoveSize 	150
SnapAttraction 	10 All Screen
XorValue 	55555
EdgeScroll 	0 0
EdgeThickness 	1
EdgeResistance 	800 20
EdgeCommand 	Left nop
ColormapFocus 	FollowsMouse
EWMHUseStackingOrderHints
EwmhBaseStruts 	4 4 4 4
DefaultLayers 	2 4 6
IgnoreModifiers L25
MoveThreshold 	10
HideGeometryWindow Move, Resize
BugOpts 	FlickeringMoveWorkaround True,  EWMHIconicStateWorkaround True
BusyCursor 	DynamicMenu True, Read True, Wait True




##############################################################################
#
#                                                                             
# Functions                                                            
#                                                                             
#
##############################################################################

# Startup Modules
  DestroyFunc StartFunction
  AddToFunc StartFunction
	+ I Module FvwmCommandS
	+ I Module FvwmPager
	+ I Module FvwmAnimate
	+ I Module FvwmButtons StatusBar 

# Startup Sript
  DestroyFunc InitFunction
  AddToFunc InitFunction
 	+ I Test (F $[FVWM_USERDIR]/autostart)\
		Exec exec /bin/sh $[FVWM_USERDIR]/autostart

  DestroyFunc RestartFunction
  AddToFunc RestartFunction
	+ I Nop

  DestroyFunc SessionInitFunction
  AddToFunc SessionInitFunction
	+ I Nop

  DestroyFunc SessionRestartFunction
  AddToFunc SessionRestartFunction
	+ I Nop

# Suckless WindowList
  AddToFunc PickWindow
   	+ I WindowList (CurrentPage) Root c c CurrentDesk NoDeskNum, \
       		NoNumInDeskTitle, NoGeometryWithInfo, IconifiedAtEnd, \
       		SelectOnRelease, MaxLabelWidth 45


# Raise & Move / Shade
  DestroyFunc Move-or-Raise
  AddToFunc Move-or-Raise
	+ I Raise
	+ M Move
	+ D Windowshade

# Move to Bottom Layer/Unmaximize
  AddToFunc MoveLower
 	+ I Layer 0 4
 	+ C Lower
 	+ M ThisWindow (Maximized) Maximize false
	+ D RaiseLower


# Automatic IconBox Elements Rearrange
  AddToFunc Deiconify-and-Rearrange
   	+ I Iconify 
   	+ I All (CurrentPage, Iconic) PlaceAgain Icon
  DestroyFunc Move-or-Iconify
  AddToFunc Move-or-Iconify
	+ I Raise
	+ M Move
	+ D Deiconify-and-Rearrange

# Raise & Resize / (Undo)Lower
  DestroyFunc Resize-or-Raise
  AddToFunc Resize-or-Raise
	+ I Raise
	+ M Resize
	+ D RaiseLower

# Maximize/Expand with EWMH compliance 
  AddToFunc Max	
  	+ C Maximize  ewmhiwa 100 100
   	+ M Maximize  ewmhiwa growonlayers $[w.layer] -1 grow grow

# Toggle FullScreen On/Off
  AddToFunc FullScreen
 	+ I ThisWindow (Maximized) Fullscreen-Stop
	+ I TestRc (False) ThisWindow (!Maximized) FullScreen-Start
  AddToFunc   FullScreen-Start
	+ I ThisWindow (Maximized) WindowStyle Title, Borders
	+ I TestRc (!Match) WindowStyle !Title, \
	                    !Borders, FixedSize, FixedPosition
	+ I TestRc (!Match) Raise
	+ I TestRc (!Match) UpdateStyles
	+ I Maximize ewmhiwa  100 100
	+ I SetEnv CurrentWindowState_$[w.id] Maximize
  AddToFunc FullScreen-Stop
	+ I DestroyWindowStyle
	+ I UpdateStyles
	+ I ThisWindow (Maximized) Maximize

# Tiling
  AddToFunc TileLeft
	+ I ThisWindow (!Shaded, !Iconic) Maximize 50 100
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 +0
  AddToFunc TileRight
	+ I ThisWindow (!Shaded, !Iconic) Maximize 50 100
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move -0 +0
  AddToFunc TileTop
	+ I ThisWindow (!Shaded, !Iconic) Maximize 100 50
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 +0
  AddToFunc TileBottom
	+ I ThisWindow (!Shaded, !Iconic) Maximize 100 50
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 -0
  AddToFunc TileTopLeft
	+ I ThisWindow (!Shaded, !Iconic) Maximize 50 50
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 +0
  AddToFunc TileTopRight
	+ I ThisWindow (!Shaded, !Iconic) Maximize 50 50
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move -0 +0
  AddToFunc TileBottomLeft
	+ I ThisWindow (!Shaded, !Iconic) Maximize 50 50
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move +0 -0
  AddToFunc TileBottomRight
	+ I ThisWindow (!Shaded, !Iconic) Maximize 50 50
	+ I ThisWindow (Maximized, !Shaded, !Iconic) Move -0 -0

# Increase/Decrease Window Size by 10 lines
  AddToFunc IncVerticalSize
	+  I ThisWindow (!Shaded, !Iconic) Resize keep w+10c   

  AddToFunc IncHorizontalSize
	+  I ThisWindow (!Shaded, !Iconic) Resize w+10c keep 
  AddToFunc DecVerticalSize
	+  I ThisWindow (!Shaded, !Iconic) Resize keep w-10c 
  AddToFunc DecHorizontalSize
	+  I ThisWindow (!Shaded, !Iconic) Resize w-10c keep 

# Dynamically Circulate Focus Across Windows 
  AddToFunc Raise-and-FlipFocus 
        + I Raise
  	+ I FlipFocus   

  AddToFunc CirculateFocus
	+ I Raise-and-FlipFocus 
	+ I WarpToWindow !raise 5 5

# Go to 'x' Page (Focusing first not Iconified/Shaded Window)
  AddToFunc GotoPageFocus
   	+ I GotoPage $*
  	+ I PointerWindow (CurrentPage, !Sticky, !Shaded, !Iconic) Focus
   	+ I TestRc (!Match) Next (CurrentPage, !Sticky, \
               !Shaded, !Iconic) Raise-and-Focus

# Move 'Window' to 'x' Page, Go to $x (focusing $Window)
  AddToFunc MoveAndGotoPage
        + I MoveToPage $*
  	+ I GotoPageFocus $*   

# (De)Iconify FvwmButtons at will
AddToFunc HideShowPanel
 	+ I All (StatusBar)  Iconify  
   




##############################################################################
#
#                                                                             
#
# Mouse Bindings                                                   
#                                                                             
#
##############################################################################

#===========[Button][Context] [Mod]    [Action]

# Root Window (Desktop):
  Mouse	        1	R 	A	Menu RootMenu Nop	
  Mouse	        3	R 	A       Menu Window-Ops Nop     

  Mouse 	8	R 	A       PickWindow		

# TitleBar Buttons:
  Mouse 	0 	1   	A       Menu Window-Ops
  Mouse 	1 	2   	A       Max
  Mouse 	3 	2   	A       ThisWindow (Maximized) Maximize false
  Mouse 	0 	2   	M       FullScreen
  Mouse 	0 	3   	A       MoveLower
  Mouse 	0 	4   	A       Iconify


# Borders/Icons:
  Mouse 	1	FS 	A       Resize-or-Raise
  Mouse 	1	TS 	A       Move-or-Raise
  Mouse 	1	I 	A       Move-or-Iconify
  Mouse 	3	I 	A       Iconify
  Mouse 	3	FST 	A       Menu Window-Ops Nop
  Mouse 	8	TSIF 	A       RaiseLower


# Scrollwheel to go up/down Pages
  Mouse 	4 	R   	A   	GotoPageFocus +0p -1p
  Mouse 	5 	R   	A   	GotoPageFocus +0p +1p


# Scrollwheel (+S) to go left/right Pages
  Mouse 	4 	R   	S   	GotoPageFocus +1p -0p
  Mouse 	5 	R   	S   	GotoPageFocus -1p +0p


# Mouse-grab with Alt for various Window-Ops
  Mouse 	1 	W 	M   	Move-or-Raise
  Mouse 	3 	W 	M   	Resize-or-Raise
  Mouse 	8 	W 	M 	Iconify
  Mouse 	9 	W 	M 	Close





##############################################################################
#
#                                                                             
#
# Keyboard Bindings                                                   
#                                                                             
#
##############################################################################

#==============[Key][Context] [Mod]    [Action]

# Ctrl + Arrow scrolls by 1 page.
  Key           Left	        A	S	Scroll -100 0
  Key           Right		A	S	Scroll +100 +0
  Key           Up               	A	S	Scroll +0   -100
  Key           Down		A	S	Scroll +0   +100

# Alt + Arrow scrolls by 1/10 of a page.
  Key 		Left	A	C	Scroll -10 +0
  Key 		Right	A	C	Scroll +10 +0
  Key 		Up	A	C	Scroll +0  -10
  Key 		Down	A	C	Scroll +0  +10

# Shift-Control + Arrow moves the pointer by 1% of a page.
  Key 		Left	A	SC	CursorMove -1 0
  Key 		Right	A	SC	CursorMove +1 +0
  Key 		Up	A	SC	CursorMove +0 -1
  Key 		Down	A	SC	CursorMove +0 +1

# Shift-Alt + Arrow moves the pointer by 1/10 of a page.
  Key 		Left	A	SM	CursorMove -10 +0
  Key 		Right	A	SM	CursorMove +10 +0
  Key 		Up	A	SM	CursorMove +0 -10
  Key 		Down	A	SM	CursorMove +0 +10

# Ctrl-Alt + Arrow moves windows to different pages
  Key 		Up	A	CM 	MoveToPage +0p -1p
  Key 		Right 	A 	CM      MoveToPage +1p +0p
  Key 		Left  	A 	CM 	MoveToPage -1p +0p
  Key 		Down  	A 	CM 	MoveToPage +0p +1p

# Ctrl-Shift-Alt + Arrow moves window to page, goes to $page focusing $window
  Key 		Up 	A 	CSM 	MoveAndGotoPage +0p -1p
  Key 		Right 	A 	CSM 	MoveAndGotoPage +1p +0p
  Key 		Left 	A 	CSM 	MoveAndGotoPage -1p +0p
  Key 		Down 	A 	CSM 	MoveAndGotoPage +0p +1p


# Super + Arrow tiles window to half screen
  Key 		Left  	A 	4 	TileLeft
  Key 		Right 	A 	4 	TileRight
  Key 		Up    	A 	4 	TileTop
  Key 		Down  	A 	4 	TileBottom

# Super-Shift + Arrow tiles window to screen quarter
  Key 		Up     	A 	S4 	TileTopLeft
  Key 		Left    A 	S4 	TileBottomLeft
  Key 		Right   A 	S4 	TileTopRight
  Key 		Down    A 	S4 	TileBottomRight

# Ctrl-Super + Arrow resizes window by 10 lines 
  Key 		Left  	A 	C4 	DecHorizontalSize
  Key 		Right 	A 	C4 	IncHorizontalSize
  Key 		Up    	A 	C4 	DecVerticalSize
  Key 		Down  	A 	C4 	IncVerticalSize


# Alt + Tab Cycles between windows 
Key 		Tab 	A 	M 	Next (CurrentPage, !Iconic, !Shaded, \
                                      	 AcceptsFocus) CirculateFocus
Key 		Tab 	A 	SM 	Prev (CurrentPage, !Iconic, !Shaded, \
					 AcceptsFocus) CirculateFocus

# Function Keys bindings
  Key 		F1	A	N	PickWindow
  Key 		F2	A	N	Popup Window-Ops
  Key 		F3	A	N	Popup Applications
  Key 		F4	A	N	Iconify
  Key 		F5	A	N	Max
  Key 		F6	A	N	Move
  Key 		F7	A	N	Resize
  Key 		F8	A	N	TileLeft
  Key 		F9	A	N	TileRight
  Key 		F10     A       N       HideShowPanel
  Key 		F11     A       N       FullScreen
  Key 		F12     A	N	Popup X11-Session
  

# XF86/Fn Keyboard Symbols bindings
  Key XF86AudioMute 	   A N Exec exec mixer -f \
                             		/dev/mixer vol 0:0 > /dev/null 2>&1
  Key XF86AudioLowerVolume A N Exec exec mixer -f \
                             		/dev/mixer vol -5:-5 > /dev/null 2>&1
  Key XF86AudioRaiseVolume A N Exec exec mixer -f \
                             		/dev/mixer vol +5:+5 > /dev/null 2>&1
  Key XF86AudioPlay        A N Exec exec mpc play > /dev/null 2>&1
  Key XF86AudioStop        A N Exec exec mpc pause > /dev/null 2>&1
  Key XF86AudioPrev        A N Exec exec mpc prev > /dev/null 2>&1
  Key XF86AudioNext        A N Exec exec mpc next > /dev/null 2>&1
  key XF86WWW              A N Exec exec seamonkey
  key XF86Terminal         A N Exec exec urxvtc -pe tabbed
  key XF86Go               A N Exec exec rofi -show run
  Key XF86Mail             A N Exec exec urxvtc -e alpine
  Key XF86HomePage         A N Exec exec xplore
  Key XF86Sleep            A N Exec exec acpiconf -s3 > /dev/null 2>&1
  Key XF86LogOff           A N Exec exec xscreensaver-command -lock





##############################################################################
#                                                                             
#
# Basic Style Settings                                                        
#
#                                                                             
#
##############################################################################

# General 
Emulate Mwm
DefaultFont "xft:Terminus\ (TTF):medium:antialias=true:size=10"


# Color scheme
CleanupColorsets
DefaultColorset 0
ColorSet 0 fg \#000000, bg \#aeb2c3, hi \#dcdee5, sh \#5d6069
ColorSet 1 fg \#000000, bg \#aeb2c3, hi \#dcdee5, sh \#5d6069
ColorSet 2 fg \#ffffff, bg \#b24d7a, hi \#dcadc2, sh \#57253b
ColorSet 3 fg \#000000, bg \#aeb2c3, hi \#dcdee5, sh \#5d6069

# Windows
Style *   BorderWidth 4 
Style *   HandleWidth 4
Style *   ColorSet 1 
Style *   HilightColorset 2
Style *   SloppyFocus
Style *   MouseFocusClickRaises
Style *   FPClickRaisesFocused 
Style *   FPGrabFocus 
Style *   FPReleaseFocus
Style *   FPLenient
Style *   FPSortWindowlistByFocus
Style *   FPIgnoreRaiseClickMotion
Style *	  NoPPosition
Style *   TileCascadePlacement
Style *   DecorateTransient
Style *   StackTransientParent
Style *   EWMHUseStackingOrderHints
Style *   EdgeMoveDelay 250
Style *   EdgeMoveResistance 10
Style *   Font "xft:Terminus\ (TTF):medium:antialias=true:size=10"
Style *   WindowShadeSteps 64
Style *   WindowShadeShrinks
Style *   HintOverride
Style *   ResizeOpaque
Style *   ResizeHintOverride
Style *   MwmDecor
Style *	  MwmBorder
Style *   MwmButtons
Style *   MwmFunctions 

# Cursors
CursorStyle ROOT left_ptr
CursorStyle TITLE left_ptr
CursorStyle DEFAULT left_ptr
CursorStyle SYS left_ptr
CursorStyle MENU left_ptr
CursorStyle WAIT left_ptr

# Menus
MenuStyle * Mwm, \
            MenuColorset 3, \
            TitleWarp, \
	    Hilight3DThick, \
	    MenuFace TiledPixmap marble.xpm, \
	    SidePic fvwm_sidebar3.xpm, \
	    SideColor #9c9fad, \
            SeparatorsLong, \
            BorderWidth 1, \
            VerticalMargins 3 3, \
	    VerticalItemSpacing 2 4, \
	    VerticalTitleSpacing 2 4, \
            Font "xft:Terminus\ (TTF):medium:antialias=true:size=10", \
	    TitleFont "xft:Terminus\ (TTF):bold:antialias=true:size=11"  

# Button Hints
ButtonStyle 1 - MWMDecorMenu
ButtonStyle 2 - Clear
ButtonStyle 3 - MWMDecorShade
ButtonStyle 4 - MWMDecorMax
ButtonStyle 6 - MWMDecorMin	

# TitleBar
TitleStyle Centered Height 15
TitleStyle ActiveUp   -- Raised
TitleStyle ActiveDown -- Raised
TitleStyle Inactive   -- Raised

# Borders
BorderStyle Inactive -- HiddenHandles NoInset 
BorderStyle Active   -- HiddenHandles NoInset 




###############################################################################
#
# FvwmAnimate
#
#
##############################################################################

SetAnimation 10 -.01 0 .01 .03 .08 .18 .3 \
  .45 .6 .75 .85 .90 .94 .97 .99 1.0

*FvwmAnimate:	Effect	Zoom3D
*FvwmAnimate:	Width	2
*FvwmAnimate:	Color	grey
*FvwmAnimate:   Iterations 16
*FvwmAnimate:	Delay	3
*FvwmAnimate:   Twist 6




##############################################################################
#
#                                                                            
# FvwmPager                                                           
#
#                                                                             
##############################################################################


Style FvwmPager BorderWidth 1,HandleWidth 1, FixedPosition, \
                FixedSize, Layer 0 2, State 2, StaysOnBottom, \
		MouseFocusClickRaises
		
*FvwmPager:	Back #7c7d82
*FvwmPager: 	Fore #2f2f4a
*FvwmPager: 	Hilight #2f2f4a
*FvwmPager: 	Font none
*FvwmPager: 	WindowBorderWidth 1
*FvwmPager: 	UseSkipList
*FvwmPager: 	MiniIcons
*FvwmPager: 	Balloons All
*FvwmPager: 	BalloonBack #a2a2d6
*FvwmPager: 	BalloonBorderColor #000000
*FvwmPager: 	BalloonBorderWidth 1
*FvwmPager: 	BalloonStringFormat %i
*FvwmPager: 	BalloonFont "xft:Terminus\ (TTF):medium:antialias=true:size=10"
*FvwmPager: 	BalloonYOffset +2
*FvwmPager: 	Geometry 136x68-0-137
*FvwmPager: 	SmallFont 5x8




##############################################################################
#
#
# IconBox
#
#
##############################################################################

Style * IconBox 48x480+0+25, IconFill Left Top, IconGrid 90 90, \
        IconTitleFormat %i, IconTitleRelief, IconBackgroundRelief 1, \
        IconBackgroundPadding 0, IconSize 48 48, IconTitleColorset 1, \
        IconBackgroundColorset 0, HilightIconTitleColorset 2

Style * IconFont "xft:Terminus\ (TTF):medium:antialias=true:size=9"

Style * StickyIcon, !StickyStippledIconTitle


Style URxvt 	!Title, IconOverride, Icon next_term.xpm 
Style SeaMonkey 	IconOverride, Icon WWW.xpm
Style Xpdf 		IconOverride, Icon pdf.png
Style NEdit 		IconOverride, Icon editor.png
Style Sylpheed 		IconOverride, Icon mail.png
Style Pcmanfm 		IconOverride, Icon fm.png
Style Audacious 	IconOverride, Icon player.png
Style slrn 		IconOverride, Icon NewsAgent.xpm
Style irssi 		IconOverride, Icon bx2.xpm
Style htop 		IconOverride, Icon Daemon.xpm
Style xmmix 		IconOverride, Icon mixer.png
Style FBReader 		IconOverride, Icon Bookshelf.xpm
Style mpv 		IconOverride, Icon mpv.png
Style Gimp 		IconOverride, Icon gimp.png
Style "OpenOffice 4.1.6" IconOverride, Icon writer.png
Style StatusBar 	Icon xosview.xpm




##############################################################################
#
#                                                                            
# FvwmButtons                                                           
#
#                                                                             
##############################################################################

Style StatusBar !Maximizable, StaysOnBottom, !Borders, !Title, \
	Layer 0 2, State 2, Sticky, WindowListSkip, CirculateSkip, \
	FixedSize, !Closable, !FixedPosition, BorderWidth 0, \
	HandleWidth 0 


*StatusBar:	Geometry 340x136-0-0
*StatusBar:	Font "xft:Terminus\ (TTF):medium:antialias=true:size=10"
*StatusBar:	Rows 2
*StatusBar:	Columns 5
*StatusBar:	Fore black
*StatusBar:	Back #afadbf
*StatusBar:	BoxSize dumb


*StatusBar: (Size 2x1, Padding 2, Frame 2, \
             Swallow(UseOld, NoClose, NoHints, Respawn, NoTitle) FvwmPager
*StatusBar: (Size 3x1, Padding 2, Frame 2, \
             Swallow(UseOld, NoClose, NoHints, Respawn, NoTitle) "xosview" \
             `Exec exec xosview`)	     

*StatusBar: (Size 1x1, Padding 2, Frame 2, \
             Swallow(UseOld, NoClose, NoHints, Respawn, NoTitle) "asclock" \
             `Exec exec asclock -12 -l "#f77bf7"`)
*StatusBar: (Size 1x1, Padding 2, Frame 2, \
             Swallow(UseOld, NoClose, NoHints, Respawn, NoTitle) "wmweather+" \
             `Exec exec wmweather+`)
*StatusBar: (Size 1x1, Padding 2, Frame 2, \
            Swallow(UseOld, NoClose, NoHints, Respawn, NoTitle) "WMmp" \
             `Exec exec WMmp`)
*StatusBar: (Size 1x1, Padding 2, Frame 2,  \
             Swallow(UseOld, NoClose, NoHints, Respawn, NoTitle) "wmrecord" \
             `Exec exec wmrecord`)	     

*StatusBar: (Size 1x1, Padding 2, Frame 2,  \
             Swallow(UseOld, NoClose, NoHints, Respawn, NoTitle) "wmix" \
             `Exec exec wmix`)

    
 

##############################################################################
#	     
#                                                                             
# Menus                                                                       
#
#                                                                           
####
##########################################################################

# Main Menu
  AddToMenu RootMenu "Fvwm Menu" Title
	+ "&Terminal%mini.term.xpm%"		Exec exec urxvtc -pe tabbed
	+ "&Launcher%mini.run2.xpm%"         	Exec exec rofi -show run 
	+ "&Applications%daemon.xpm%"     	Popup Applications
	+ ""                  Nop
	+ "&Window Ops%mini.windows.xpm%"       Popup Window-Ops
	+ "&X11 Session%mini.bx2.xpm%"      	Popup X11-Session

  AddToMenu "Window-Ops"
  	+ "&Move%mini.move1.xpm%"               Move
	+ "&Resize%mini.resize3.xpm%"           Resize
	+ "&Shade%mini.raise2.xpm%"             WindowShade
	+ "&TileLeft%mini.arrowleft.xpm%"       TileLeft
	+ "&TileRight%mini.arrowright.xpm%"     TileRight
	+ "&Stick%mini.stick.xpm%"              Stick
	+ ""                 Nop  
	+ "
&Close%mini.cross.xpm%"              Close
	+ "&Kill%mini.destroy.xpm%"             Destroy

  AddToMenu "X11-Session"
	+ "&Refresh Screen%mini.turn.xpm%"      Refresh
	+ "&Restart WM%mini.exclam.xpm%"        Restart
	+ ""                 Nop
	+ "Lock Screen%mini.lock.xpm%"          Exec exec \
						  xscreensaver-command -lock
	+ "Exit FVWM%mini.exit.xpm%"            Quit



# Application Menu
  AddtoMenu Applications
	+ "&Editors%mini.editor.png%"           Popup Editors
	+ "&File Managers%mini.folder1.xpm%"    Popup FM
	+ "&Terminal Emulators%mini.sun_term.xpm%" Popup Terminal
	+ "&Network%mini.netscape1.xpm%"        Popup Network
	+ "&Multimedia%mini.sounds1.xpm%"       Popup Multimedia
	+ "&Graphics%mini.paint1.xpm%"          Popup Graphics
	+ "&Office%mini.bookshelf.xpm%"         Popup Office
	+ "&System%mini.computer.png%"          Popup System
	+ "&Utils%mini.accessories.png%"        Popup Utils

 AddtoMenu Editors
	+ "Joe%mini.joe.xpm%"		        Exec exec urxvtc \
	                                            -g 92x35 -e joe
	+ "Xfw%mini.xfw.xpm%"	                Exec exec xfw
	+ "Nedit%mini.nedit.xpm%"	        Exec exec nedit
	+ "Vi%mini.vi.xpm%"                     Exec exec urxvtc \
	                                            -g 92x35 -e vi
  AddtoMenu Network
	+ "&Browsers%mini.www.xpm%"         	Popup Browsers
	+ "&Mail%mini.mail.png%"            	Popup Mail
	+ "&News%mini.newsagent.xpm%"           Popup News
	+ "&Chat%mini.chat.xpm%"             	Popup Chat
	+ "Transmission%mini.transmission.xpm%" Exec exec transmission-gtk

  AddtoMenu Browsers
	+ "W3m%mini.w3m.xpm%"                   Exec exec urxvtc -g 92x35 \
	                                            -e w3m -F -graph www.duckduckgo.com
	+ "Seamonkey%mini.seamonkey.xpm%"       Exec exec seamonkey
	+ "Vimb%mini.netscape.xpm%"             Exec exec \
	                                            vimb www.duckduckgo.com
	+ "Gopher%mini.gopher1.xpm%"            Exec exec urxvtc -g 92x35 \
	                                            -e gopher gopher://gopher.floodgap.com/1/v2
  AddtoMenu Mail
	+ "Sylpheed%mini.sylpheed.png%"         Exec exec sylpheed
	+ "alpine%mini.pine.xpm%"    		Exec exec urxvtc \
	                                            -g 92x35 -e alpine
	+  "neomutt%mini.mutt.xpm%"             Exec exec urxvtc \
	                                            -g 92x35 -e neomutt 
  AddtoMenu News
	+ "liferea%mini.liferea.xpm%"  		Exec exec liferea
	+ "newsboat%mini.rss.xpm%" 		Exec exec urxvtc \
	                                            -g 92x35 -e newsboat
	+ ""                 Nop
	+ "tin%mini.news1.xpm%"              	Exec exec urxvtc \
	                                            -g 92x35 -e rtin -aA
	+ "slrn%mini.news2.png%"             	Exec exec urxvtc \
	                                          -g 92x35 -e slrn -h snews://orbitalfox.eu
	+    "pan%mini.newsgroups.xpm%"         Exec exec pan 
	
  AddtoMenu Chat
+ "Irssi%mini.irc.xpm%"               	Exec exec urxvtc \
                                            -g 92x35 -e irssi    
+ "HexChat%mini.xchat.xpm%"            	Exec exec hexchat
+ ""                 Nop
+ "Pidgin%mini.pidgin.xpm%"            	Exec exec pidgin
+ "Profanity%mini.xmpp.xpm%"           	Exec exec urxvtc \
                                           -g 92x35 -e profanity
+ ""                 Nop
+ "SDF%mini.putty.xpm%"        		Exec exec urxvtc \
                                          -g 92x35 -e ssh sehnsucht@tty.sdf.org
+  "Tootstream%mini.mastodon.xpm%"      Exec exec urxvtc \
                                          -g 92x35 -e tootstream
+ "rtv%mini.reddit.xpm%"        	Exec exec urxvtc \
                                                -g 92x35 -e rtv	
  AddtoMenu FM
	+ "Pcmanfm%mini.fm.png%" 		Exec exec pcmanfm
	+ "Xfe%mini.xfe.xpm%"     		Exec exec xfe
	+ "nnn%mini.fileman.xpm%"     		Exec exec urxvtc -e nnn
	+ "Xplore%mini.xplore.xpm%"  		Exec exec xplore

  AddtoMenu Terminal
	+ "Xterm%mini.xterm1.xpm%" 		Exec exec xterm
	+ "RXvt%mini.term.xpm%"  		Exec exec urxvt -pe tabbed
	+ "Eterm%mini.term2.xpm%" 		Exec exec Eterm

  AddtoMenu Multimedia
	+ "EasyTag%mini.info.xpm%" 		Exec exec easytag
	+ "MPV%mini.mpv.png%" 			Exec exec mpv \
	                           -player-operation-mode=pseudo-gui
	+ "Xcdroast%mini.xcdroast.xpm%" 	Exec exec xcdroast
	+ "Audacious%mini.xmms2.xpm%"		Exec exec audacious
	+ "ncmpc%mini.mpc.xpm%" 		Exec exec urxvtc  -e ncmpc
	+ "gradio%mini.radio.xpm%" 		Exec exec gradio
	+ "mps-youtube%mini.youtube.xpm%" 	Exec exec urxvtc -e mpsyt
	+ "xine%mini.xine1.xpm%" 		Exec exec xine 
	+ "audacity%mini.audacity.xpm%" 	Exec exec audacity

  AddtoMenu Graphics
	+ "Xfi%mini.xfi.xpm%" 			Exec exec gpicview
	+ "Xv%mini.xv2.xpm%" 			Exec exec xv
	+ "OpenOffice Draw%mini.draw.xpm%" 	Exec exec \
	                                             openoffice-4.1.6-sdraw
	+ "GIMP%mini.gimp.xpm%" 		Exec exec gimp
	+ "Dia%mini.xfig.xpm%" 			Exec exec dia
	+ "Xpaint"%mini.xpaint1.xpm% 		Exec exec xpaint

  AddtoMenu Office
	+ "Xpdf%mini.pdf.png%" 			Exec exec xpdf
	+ "E-book reader%mini.bookshelf.xpm%"	Exec exec FBReader
	+ "Lyx%mini.lyx.xpm%" Exec exec lyx
	+ "GhostView%mini.gv.xpm%" 		Exec exec gv
	+ "XDrawChem%mini.chem.xpm%" 		Exec exec xdrawchem
	+ ""                 Nop
	+ "OpenOffice Calc%mini.scalc.xpm%" 	  Exec exec \
						   openoffice-4.1.6-scalc
	+ "Openoffice Impress%mini.simpress.xpm%" Exec exec \
						   openoffice-4.1.6-simpress
	+ "Openoffice Math%mini.smath.xpm%"       Exec exec \
	                                           openoffice-4.1.6-smath
	+ "OpenOffice Writer%mini.swriter.xpm%"   Exec exec \
	                                           openoffice-4.1.6-swriter
						   
  Ad
dtoMenu Utils
	+ "Xephem%mini.xephem.xpm%" 		Exec exec xephem
	+ "Free42%mini.calc2.xpm%" 		Exec exec free42bin
	+ "XDiary%mini.book2.xpm%" 		Exec exec xdiary
	+ "Xanalyser%mini.midi.xpm%" 		Exec exec xanalyser
	+ "Xarchiver%mini.lnxzip.xpm%" 		Exec exec xarchiver
	+ "Coolman%mini.manual1.xpm%" 		Exec exec coolman
	+ "Xmaddressbook%mini.book4.xpm%" 	Exec exec xmaddressbook
	+ "mgdiff%mini.diff.xpm%" 		Exec exec mgdiff
	+ "Xcolorsel%mini.wizard.xpm%" 		Exec exec xcolorsel 

  AddtoMenu System
	+ "&Settings%mini.gears.xpm%"  		Popup Settings
	+ ""                 Nop
	+ "Gkrellm%mini.gkrellm1.xpm%" 		Exec exec gkrellm
	+ "Xosview%mini.xosview.png%" 		Exec exec xosview
	+ "Htop%mini.graph.xpm%" 		Exec exec urxvtc \
						   -92x35 -e htop
	+ "SMART%mini.fdisk.xpm%" 		Exec exec gsmartcontrol
	+ "slurm%mini.bench.xpm%" 		Exec exec urxvtc \
						   -e slurm -c -i em0
	+ "tcpview%mini.server.png%" 		Exec exec tcpview
	+ "bsdconfig%mini.bsd.xpm%" 		Exec exec urxvtc -g bsdconfig
	+ "ncdu%mini.diskette.xpm%" 		Exec exec urxvtc -e ncdu
	+ "ddd%mini.help.xpm%"    		Exec exec ddd
	+ "xkill%mini.destroy.xpm%" 		Exec exec xkill

  AddtoMenu Settings
	+ "Customize Look and Feel%mini.style.xpm%" 	  Exec exec \
	                                                       lxappearance
	+ "Monitor Settings%mini.monitor.xpm%" 		  Exec exec lxrandr
	+ "Input Device Preferences%mini.mouse.xpm%" 	  Exec exec lxinput
	+ "Xmmix%mini.mixer.png%" 			  Exec exec xmmix
	+ "Nvidia Settings%mini.nvidia2.xpm%" 		  Exec exec \
	                                                      nvidia-settings
	+ "Screensaver%mini.screensaver.xpm%" 		  Exec exec \
	                                                     xscreensaver-demo
	+ "Preferred Applications%mini.applications.xpm%" Exec exec \
	                                            exo-preferred-applications

My ~/.fvwm/autostart script only sets up the wallpaper, as I still keep everything else on .xinitrc, in order to be able to quickly switch to IceWM

#!/bin/sh
xli -onroot -fullscreen $HOME/Pictures/Wallpapers/saturn1.jpg &

In case you wanted to venture yourselves in the awesomeness FVWM, keep in mind there are official FVWM Forum (https://fvwmforums.org/phpBB3/) and mailing list available to ask for help.

EDIT: And here's how it looks
![FVW FVWM

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