CodePlex Started in May 2006 , the service offered an alternative to SourceForge. It was based initially on Microsoft’s Team Foundation Server source control and later added options to use Subversion, Mercurial, and git.
At the time, there were limited options for hosting projects. Then, SourceForge was the big one, but it always seemed light on feature development and heavy on advertising. CodePlex on the Web was much more attractive and less cluttered also.
Accordingly, Microsoft has decided to stop running the service. From today, new projects can no longer be created. In October, all projects will be set to read-only. On December 15, CodePlex will be shut down completely, and the website will be replaced with a static archive. Projects and sources will still be browsable online, but the source control system will no longer be operational.
GitHub is the creating a new family for CodePlex projects, with a straightforward import process that will copy source code and documentation across.