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.
Painty - Kid, if you have a dream to paint the best picture in the whole world, this is the place to start...
I Know It - "I Know It" is an online game for practicing primary-level math concepts.
Lil' Picasso - Lil Picasso is a coloring and creativity package for children.