Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Calmerry - Feel calm with online therapy
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Terapify - Online therapy platform for Spanish-speaking people
Quake - Quake is a series of first-person shooter video games released by id Software.
Headspace - Meditation made simple. Brilliant things happen in calm minds.