Moot - Moot is a platform for gamers through which they can take part in gaming discussions.
itch.io - An online game marketplace and community.
Plink - Social & Matchmaking platform for gamers.
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Bigfoot - Bigfoot is a gaming assistant for mobile gamers that provides them with various useful tools to enhance their gaming experience.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.