Forums:
- http://www.bulletphysics.org/Bullet/phpBB3 , gets more replies than Stack Overflow... lol newbs.
- http://meta.stackoverflow.com/questions/290014/merging-bullet-and-bulletphysics-tags
Demos without source code:
- Moby Motion - KEVA Planks - Bullet Physics (HD) https://www.youtube.com/watch?v=-6Sl5CCxp3Q , tower destruction contraptions.
- yonarw - (my) openGL engine + Bullet physics - https://www.youtube.com/watch?v=INmMohKp7KY , dynamic shadows