Basically any wiki should suffice for those requirements. However, integrating those requirements with other workflows tends to be trickier. Atlassian's tools (

Basically any wiki should suffice for those requirements. However, integrating those requirements with other workflows tends to be trickier. Atlassian's tools (Jira, Confluence, etc.) tend to win by default, but if you're willing to do some duct-tape work other solutions are fine too.