Question2Answer - A Q&A site helps an online community to share knowledge.
Editthis - A free wikifarm project allowing to keep private wiki and build it up through MediaWiki syntax.
Stack Overflow - Community-based Q&A part of the Stack Exchange platform.
SaidIt.net - Saidit.net - say your truth.
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
MyWikis - A premium wiki host with top-class quality, excellent support, and VisualEditor (a WYSIWYG...