Funambol

Funambol is the leading provider of mobile cloud sync. Its mobile open source platform can be used for many types of mobile applications, including push email, PIM data synchronization and device management. It provides C++ and Java client APIs and server side Java APIs. It facilitates the development, deployment and management of a wide range of mobile projects.

Funambol syncs this data with billions of phones and with thousands of applications and online services. It doesn't matter if you use Gmail, Yahoo!, AOL, Hotmail, Outlook or Thunderbird, with Funambol, you can sync your email & PIM on many mobile handsets.