Candiwi – Candid Distributed Wiki
http://doku.candiwi.org/articles/view/About%20candiwi

Candiwi is a new kind of wiki. The difference is that changes to an article are only made when other users accept them. When you want to change something, you create a proposal. This will contain your changes. In your proposal you can edit, add, remove or rename articles at will. All changes made in a proposal are isolated and have no effect on the articles in the “Trunk”. Other users can also collaborate on your proposal. When you’re finished editing, you can submit the proposal for everybody to vote on. If it is accepted, the changes are applied to the “Trunk”. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.