LogicLike - Improve logical thinking through engaging brain games
Lumosity - Discover what your mind can do. Improve memory, increase focus, and find calm - with the #1 brain training app. Get started now.
JobFlare - Brain games for job seekers
Elevate - Elevate is an award-winning brain training tool designed to build communication and analytical skills.
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
Human Benchmark - A web game to benchmark your brains.