Ranked in these QuestionsQuestion Ranking
Pro Multiple version control systems
It doesn't use a bridge on top of TFS, instead it uses real Git or Mercurial to host projects.
Pro Binary releases
Pro Users can create forums for their projects
CodePlex gives developers the ability to have not only wikis but also discussion forums for their projects.
Pro Wiki included
Developers can create fully-fledged wikis for their projects. Just like any other wiki, they can then be easily edited and improved with time.
Pro Issue tracker
Fully featured issue and bug tracker is included. Users can create and comment on issues and developers can close them once they are solved.
Con No private repositories
CodePlex does not offer the option to have private repositories at all, and it's understandable because CodePlex was built to host open-source projects.