Seamless3d is a free NURBS based modelling and animation software with much of the focus on creating avatars optimized for real time animation. It is an open source 3D modelling software available under the MIT license.

The models for the virtual reality world Techuelife Island were created using Seamless3d technology. Techuelife Island is showcased by Blaxxun as an example of what is possible when using the interactive multi-user Blaxxun platform.

Many Seamless3d tutorials have been translated to French.

For more information:

https://en.wikipedia.org/wiki/Seamless3d