Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Quake - Quake is a series of first-person shooter video games released by id Software.
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.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Clever - syncing between education applications for K-12 schools