• Get Satisfaction
  People-Powered Customer Service. community feedback forum
  in online software & services with feedback forum by 13 users
• Phorum
  PHP Message Board. Fast. Feature rich, but thru plugins to avoid bloat
  Phorum is open source forum software with a penchant for speed. Phorum's very flexible hook and module system can satisfy every web master's needs.
  in design & dev apps & util with board bulletin discussion forum message by 4 users
• PunBB
  opensource discussion board. php. minimal. lightweight.
  PunBB is a fast and lightweight PHP-powered discussion board. It is released under the GNU General Public License.
  board bulletin community discussion fast forum lightweight pun punbb software
  in design & dev apps & util with board bulletin discussion forum php by 5 users
  Note: compare to: phpbb.com (full featured), usebb.net (small), minibb.net (paid plugins), phorum.org (php 5, fast, feature rich but as plugins to avoid bloat)
• TwelveStone Forums
  forums on tech issues
  in design & dev apps & util with forum tech tutorial

forum from all users