Question2Answer is software for creating social Q&A sites that encourage your online community to share knowledge. It implements sites similar to Stack Overflow or Stack Exchange. It helps you create content that is very search engine (SEO) friendly. It can be installed in five minutes or less. Styling is easy with CSS themes. It has a fast integrated search engine. There is a points-based reputation management. Categories and tags can be used, with automatic completion. Email notifications and RSS are supported. Voting, comments, and follow-on questions are supported. The admin interface is simple and secure. Scaling to over 1,000,000 posts is possible. Built-in user account management or single sign-on for existing sites can be used.