Blender is a free, open source 3D modelling, texturing, animation and rendering package. If you’ve got the time and inclination to reach the top of its fairly steep learning curve, then you'll find it can be nearly as powerful as any top of the line 3D tool.
To help you get up to speed more quickly we’ve collected together some of our favourite video tutorials below. You can also find a number of useful tutorials on the blender website.
For a list of hotkeys visit the Blender 3D wiki page
Sources: YouTube.com - www.blender.org - en.wikibooks.org