F(?) Virtual Window Manager

 FVWM is a powerful ICCCM2 compliant multiple virtual desktop window manager
 for the X Window System. FVWM requires relatively little memory.
 .
 This 2.6 version includes new features like full support of the EWMH
 (Extended Window Manager Hints) specification, internationalization,
 improved window decoration code (no flickering anymore),
 bi-directional asian text support, FreeType font support
 (antialiasing), image rendering, Perl based module library, support
 for PNG images, side titles and much more.