MathIsFun Times Table - Learn Your Multiplication Tables
incron - This program is an "inotify cron" system. It consists of a daemon and a table manipulator.
GCompris - Educational Game for Children 2 to 10 years old.
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.
Anacron - Anacron is a periodic command scheduler. It executes commands at intervals specified in days.