A social Q&A site encourages your online community to share knowledge and helps create content that is very search engine (SEO) friendly. Question2Answer is a free PHP/MySQL solution for social Q&A sites (like Stack Overflow or Stack Exchange) with the following features:• Five minutes (or less!) to install.• Easy styling with CSS themes.• Fast integrated search engine.• Points-based reputation management.• Categories and/or tags (with auto complete).• Email notifications and RSS support.• Voting, comments and follow-on questions.• Simple and secure admin interface.• PHP/MySQL scalable to 1,000,000+ posts.• Built-in user account management, or...• Single sign-on for existing sites.
