Brain Games - Boost memory power with free 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.
Dualnback.works - Dual N-back is a specific brain training exercise, that's been shown by research - it might improve fluid intelligence.
Brain Workshop - Brain Workshop is a open-source version of the dual n-back brain training exercise.
LeveLisa - The brain game that creates creativity
Elevate - Elevate is an award-winning brain training tool designed to build communication and analytical skills.