CodePlex

I just heard about CodePlex from Microsoft. After browsing its some core features, I can say that this is really a cool online development environment. You can use CodePlex to create projects and share with your fellow developers. Or you can also join other projects of your interest that already have started. With that, you can also add some project management tools like forum, issue tracker, source code dissemination, project team communicator, news feed aggregator etc. to any CodePlex project.

CodePlex appears more or less like that old GotDotNet except this has very simple and clean user interface and very improved performance. So I guess this should be replacement of GotDotNet project.