Confluence is an enterprise wiki software that enables online collaboration, knowledge and document management, and file sharing. It supports open source and commercial applications, and offers a free 30-day evaluation period.
For users, whether business or technical, the WYSIWYG interface is simple and intuitive to use. Additionally, Confluence boasts an unlimited number of users and pages, and fine-grained security and permissioning, ensuring that your content is safe and secure. It integrates well with other applications via an open framework, and enables email management, document management, and full-text search.
A diverse array of organizations in over 40 countries have chosen to implement Confluence, and for good reasons - its feature set is extensive and impressive.
Qualified open source and non-profit organizations can use Confluence for free, while commercial users can take advantage of upfront and no-hassle pricing. For those who wish to try out the software, a free 30-day evaluation is available.
Version 2.1.3: http://confluence.atlassian.com/display/DOC/Release+Notes