LogicLike - Improve logical thinking through engaging brain games
JobFlare - Brain games for job seekers
Hue Brain Games - Play interactive games with your Philips Hue lights
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
AlphaBetty Saga - AlphaBetty Saga is a single-player game developed for Android.
Flow Free - Big Duck Games is an indie mobile game studio, focused on creating quality casual games, and especially puzzle games.