Anacron - Anacron is a periodic command scheduler. It executes commands at intervals specified in days.
Memo to Me - Online email & SMS reminder service.
mcron - mcron is GNU's implementation of cron. It is a 100% compatible replacement for Vixie cron.
Free Alarm Clock - Free Alarm Clock is a free, full-featured and user-friendly computer alarm clock for Windows.
fcron - Fcron is a scheduler designed for Unix/Linux systems, especially usefull when your system is not up all the day long.
Date Reminder - Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay...