PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Brain Games - Boost memory power with free brain games
Clever - syncing between education applications for K-12 schools
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
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.
Pixelogic - Daily Picross - Nonogram logic game with 5000+ puzzles and a daily puzzle