Apache Cotton, previous named Mysos, is now an Apache incubator project, and we've moved the codebase to ASF.
Please check out the source code from Apache's git repostory:
git clone https://git-wip-us.apache.org/repos/asf/incubator-cotton.git
or if you prefer GitHub, use the GitHub mirror:
git clone https://github.com/apache/incubator-cotton.git
We'll update the new Cotton homepage soon for other information including documentation and a getting started guide, etc.