Math Games - Math Games is a website which kids in Preschool through 8th grade can practice math.
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
GCompris - Educational Game for Children 2 to 10 years old.
Kid Pix - Kid Pix is a bitmap drawing program aimed at children.
DragonBox Algebra - DragonBox Algebra 5+ - The educational game that secretly teaches you algebra.
Painty - Kid, if you have a dream to paint the best picture in the whole world, this is the place to start...