The Kilobyte's Gambit - Try beating 1024 bytes of Javascript
Lumosity - Discover what your mind can do. Improve memory, increase focus, and find calm - with the #1 brain training app. Get started now.
Flow Free - Big Duck Games is an indie mobile game studio, focused on creating quality casual games, and especially puzzle games.
Elevate - Elevate is an award-winning brain training tool designed to build communication and analytical skills.
Hexic Link - Hexic Link is an Addictive, Puzzle, and Single-player video game developed and published by ThinkCube Inc.
Brain Workshop - Brain Workshop is a open-source version of the dual n-back brain training exercise.