PhysOrg Discussion Forum
- Applied physics, nanotechnology, quantum physics, and semiconductor technology. Also discussions of the latest physics news.
- http://forum.physorg.com/

Groupsrv.com - Physics Forum
- Discussion for scientists.
- http://www.groupsrv.com/science/viewforum.php?f=1

Advanced Physics Forums
- Intended primarily for physics majors, graduate students, postdocs and faculty. Get meeting information, theoretical and research information and exchange of ideas. Meant for the physics community throughout the world.
- http://www.advancedphysics.org/

Scott Watson's Physics FAQs
- A list of FAQs (Frequently Asked Questions) regarding Cosmology, String theory, Relativity and General Physics
- http://www.het.brown.edu/people/watson/pages/resources.htm

Physics Forums
- Bulletin boards on physics and related subjects. Includes related polls and a list of active threads.
- http://www.physicsforums.com/