Intelligence and mental training tools
Peak (official website) is a fun and free brain training workout that uses brain games and puzzles to challenge memory, language and critical thinking to keep your mind active.
With brain games made in partnership with academics from major universities like Cambridge and NYU, and more than 12 million downloads, Peak is a fun and challenging brain training experience.
Lumosity (official website) is a cognitive training program. It is a fun and interactive way to train your brain and learn how your mind works. Used by more than 100 million people around the world, the Lumosity program consists of science-based games designed to exercise memory, attention, speed, flexibility, and problem solving.