These were developed mainly for use in fluxbox but would probably be usable in any non-tiling EWMH/NetWM compatible X Window Manager.
xwin-utils generic functions for the X11 scripts
Generally, these require wmctrl(1)
binpack - a python script that optimally packs windows onto the screen - used by the tile script; useful in most non-tiling WMs eg Fluxbox
fetch-app - bring an application to the front of current monitor no matter which workspace it is on; or starts it up, if necessary
half-screen - changes the window size to a proportion of the monitor size eg a half, a third, a quarter, a sixth, a ninth of the screen; useful in most non-tiling WMs eg Fluxbox