A great solution for those people who require a two way over the air synchronization of e-mail, contact data with a Microsoft exchange.

Astrasync for Blackberry also has been crammed packed with loads of added features and the latest version 4.0 is now available.

You now have the option of message content being displayed in either HTML or plain text, Hotlinks are now provided in messages for telephone numbers, e-mail addresses and also website addresses.
A brand new interface which are more consistent with the native BlackBerry options screens. To name just a few of the improved features. Source – crackberry.com