From Valve Developer Community
- See Category:Blender for tutorials.
Blender and Source
- The Blender SMD Tools can import and export SMD and DMX.
- See Animation in Blender to learn how to rig and animate in a way that survives SMD export.
- You can store as many models as you like in the same .blend file. Use scenes and/or layers to easily manage the different elements.
- Official help portal
- Blender 3D: Noob to Pro (Wikibook)
- Blender Basics - 4th Edition (printable classroom textbook released under Creative Commons BY NC SA)