The Book with No Pictures - A different kind of kids book by B.J. Novak
Math Games - Math Games is a website which kids in Preschool through 8th grade can practice math.
Epic - Instant access to thousands of great kids books.
DragonBox Algebra - DragonBox Algebra 5+ - The educational game that secretly teaches you algebra.
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
GCompris - Educational Game for Children 2 to 10 years old.