Atlassian Confluence

Confluence, the professional J2EE wiki, is a knowledge management tool designed to make it as easy as possible for a team to share information with each other, and with the world.

Confluence's simple but powerful editing and site management features help sharing information, collaborating on documents and brainstorming ideas, all from a single web-based location. Confluence adds professional features rarely seen in wiki software (and especially not all in the same wiki package): flexible privilege-based security management, blogging, automated refactoring, exporting pages or entire spaces to HTML or PDF, a comprehensive remote API, easy 'unpack and run' installation; all wrapped up in Atlassian's 'Legendary Service'.