Apple Game Center - Game Center brings social gaming to OS X and iOS apps.
Dark Language - Holistic language, editor, and infra for building backends
Nakama - Nakama is an open-source distributed social and realtime server for games and apps.
Zukitwo - Zukitwo is a Gnome Shell and GTK theme that currently works on Gnome Shell 3.14 and the latest version of GTK.
Games Xtreme - Social discovery for gamers.
Materia - Materia is a development environment to build advanced mobile and web applications.