1)   MiniMinder 7.22
MiniMinder serves a slick, daily countdown for all the events you wish to track. Set yearly, quarterly, monthly or daily events, events such as "4th Thurs" or "every 28" days, and you can also set alarms to popup at specific times throughout the day.

 2)   Mindful 1.0.6
Mindful is a freeware program that combines an event reminder and a mini calendar in a simple to use system tray application. Use Mindful to be reminded of appointments, anniversaries and any occasions, recurring or not, that you want to remember.

 3)   CyberMatrix Reminder 1.00
CyberMatrix Reminder is a freeware event scheduler and event reminder. This software program allows you to enter upcoming events that you need to be reminded of. When the event approaches a reminder notice will pop up to remind you of the event.