BirdieSync is described as 'Synchronize your Android, Pocket PC, or iPhone with Thunderbird and Sunbird' and is a Calendar in the Office & Productivity category. There are three alternatives to BirdieSync for a variety of platforms, including Android, Windows, Android Tablet, Linux and Mac. The best alternative is EteSync, which is both free and Open Source. Other great apps like BirdieSync are Android Sync Manager WiFi (Free) and GeneralSync (Paid).
Android Manager WiFi lets you sync your Android phone with your PC over WiFi. With Android Manager, you can manage, sync, and back up your contacts, messages, photos, video, music, applications and calendar.