Blender.org: Free 3D Content Creation Suite (Open Source)

Blender.org is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License. I dont really know too much about this sector, but the quality of images made using this software is simply amazing. Im a really big fan of open source software and companies trying to offer a great tool to users for free, and Blender is no exception.
I have attached a sample of what has been made using the Blender tool. If you are in graphic or animation design, it would be great to hear your views on this tool.
Blender is an open source 3D content creation suite.
It is an all-in-one package for 3D modeling, animation, rendering, post-production, and gaming

User interface of Blender is formed of boxes, where all of them can be moved for the max. flexibility for not being blocked by the UI.
Advanced animations & the integrated game engine can be controlled with Python scripting which also makes developers a part of the game rather than only the designers.
A very detailed feature list can be found here.
The software has a large community & is very well-documented which makes it easier to improve your skills.

An open source game built with Blender:

 

Yo Frankie! is an open source game built with Blender & its integrated game engine.
The game is also like a source of information (as you can download the source files) for anyone planning to develop games with the application.
P.S. Anyone into 3D design is probably aware of Blender but this post is published considering it may be helpful to fresh 3D designers.

Requirements: Python
Compatibility: All Major OSs
Website: http://www.blender.org/
Download: http://www.blender.org/download/get-blender/