Facebook Live Video and Collages - Show your friends what you’re seeing in real time
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
DUSK - Anonymous live video
Quake - Quake is a series of first-person shooter video games released by id Software.
Live Video On Tumblr - Tumblr's answer to Periscope, Facebook Live and Twitch
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.