SyncJe - wirelessly synchronizes your BlackBerry Contacts, Calendar and Tasks with SyncML servers.
Set it up once, and forget about it, your BlackBerry syncs wirelessly, and automatically. Synchronizing also backs up your information, so you are safe if your BlackBerry is lost
MilkSync (BlackBerry) - is an application that synchronizes Remember The Milk with the built-in Tasks application on your BlackBerry.
· Two way synchronization (or optionally RTM to BlackBerry, or BlackBerry to RTM)
· Scheduled synchronization (e.g
BlackBerrySync.com Mobile Launcher-this free home screen launcher gives you one click access to the BlackBerrySync.com Mobile Edition. You will find the latest BlackBerry News, Reviews, and Deals at BlackBerrySync.com
GCalSync is an open source application that lets you do a two-way synchronization between Google Calendar and your phone's built-in calendar.
Download events to your phone, or add an event on your phone and upload it to Google Calendar