Atomic Alarm Clock is also an atomic-time synchronizer and advanced replacement for Windows tray clock. See the time, seconds, day, date, countdowns, percent of memory in use and system UpTime in different skins. Displays the time for any of the time zones. Over 130 skins are included in the distribution.
-Multiple time formats
-Unlimited Alarms (that i could see, didn't go too high though, only ~50 tested)
-custom seperate calendar
90 MHz Pentium or equivalent
Microsoft Windows 2000/2003/XP/Vista
16 MB application RAM
2 MB free hard disk space