GCompris - Educational Game for Children 2 to 10 years old.
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
Kid Pix - Kid Pix is a bitmap drawing program aimed at children.
I Know It - "I Know It" is an online game for practicing primary-level math concepts.
Painty - Kid, if you have a dream to paint the best picture in the whole world, this is the place to start...
Math Games - Math Games is a website which kids in Preschool through 8th grade can practice math.