mcron - mcron is GNU's implementation of cron. It is a 100% compatible replacement for Vixie cron.
GCompris - Educational Game for Children 2 to 10 years old.
Anacron - Anacron is a periodic command scheduler. It executes commands at intervals specified in days.
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
fcron - Fcron is a scheduler designed for Unix/Linux systems, especially usefull when your system is not up all the day long.
I Know It - "I Know It" is an online game for practicing primary-level math concepts.