Birthday Reminder is a small application that takes place in the system tray. It searches your default Windows Address Book (WAB) and possibly displays the contacts who have their birthdays or wedding anniversaries today.
If some birthdays are available, the icon blinks in the system tray. You can then double-click it to display the list of contacts. Select a contact in the list and click E-mail to send him/her an e-mail.
You can configure the application to automatically run at startup by ticking the "Run at startup" options in the menu.