Microsoft Truespace 7.6 now free

The acquisition of Caligari (creators of Truespace) by Microsoft has lead to the release of Truespace 7.6 for free.

Microsoft hopes it will help people to create content for their Virtual Earth system, not unlike the use of the free version of SketchUp to create models for Google Earth...

This is a full version, including modeling, animation, rendering and customization, but for Windows only. And you have to get used to the icon-based interface (hundreds of icons for most functions. The interactive widgets in the viewport and the realtime rendering features in the modeling view are compelling features.