Official source release for Shadow Warrior
Quake GPL Source Release
Chocolate Doom is a Doom source port that is conservative and historically accurate.
Yet another DOSBox fork
Open Watcom V2 fork - binary distribution is available on http://sourceforge.net/projects/openwatcom/files/current-build/
Pale Moon web browser
A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware.