Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
Clever - syncing between education applications for K-12 schools
Quake - Quake is a series of first-person shooter video games released by id Software.
Claroline - Claroline is a collaborative eLearning and eWorking platform.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.