FVWM-crystal creates an easy to use desktop environment using fvwm2 as its window manager and main core. From another point of view its just a very powerful fvwm configuration.

Nifty small dock applet for Window Maker that continuously displays CPU and case temperature by virtue of lm_sensors

This is a controller GUI for the run-time options of QEMU computer emulator. It can be used as a stand-alone application or as a plug-in for Qemu Launcher. (Only x86 PC emulator is supported.)

GitHub's "octicons" webfont, you can use over 100 icons with this web font.

This is the GNU C++ compiler, a fairly portable optimizing compiler for C++.