This android app reminds you about upcoming birthdays. You can read and write the date of birth of all contacts in your address book. This project moved to GitHub: https://github.com/sealor/BirthdayReminder
ICSSync is an Android app syncing calendars between an Android device and an ICS file on a WebDAV server (plain WebDAV or SVN). ICS is the iCal file format. ICSSync provides manual and configurable auto sync using a background service.