The FREE Atollic TrueSTUDIO®/AT91SAM Lite product includes a powerful Eclipse-based IDE with editor, compiler and debugger, as well as excellent AT91SAM target support.

The product have no code-size limitation and no usage-time limitation, thus providing Atmel developers with a zero-cost starting point for professional development.

A Professional version adds advanced features like multiprocessor debugging, team collaboration, integration of version control systems and bug databases, source code review & review meetings, graphical UML modeling, and a x86/PC compiler and debugger in addition to the ARM tools.

FREE download of the Lite version:
http://www.atollic.com/index.php/truest ... gets/atmel

Product information:
http://www.atollic.com/index.php/truestudio

Video tutorials:
http://www.atollic.com/index.php/videotutorials

Not anymore! Unless someone knows where to get a copy, anyone?

They released an ARM version which supports some of the AT91SAM's
http://www.atollic.com/index.php/target ... getsupport

Easily reachable from the TLD