Actually I was working to give a solution in order to integrate Eclipse (opensource development enviroment) into Team Foundation Server. There is a commercial solution in order to achieve that, the company name is TeamPrise.
The focus of the Teamprise Client Suite 2.0 release is to provide full support for the work item tracking features of Visual Studio 2005 Team Foundation Server. Using Teamprise 2.0, users will be able to perform the following operations:
Teamprise 2.0 also completes its support for the source control features of Team Foundation Server by implementing the following operations:
Finally, this release adds support for the Team Explorer view of Visual Studio 2005, giving users full access to the Team Foundation Server repository, including:
The Teamprise applications require:
Then next screenshots show how it works in real live!!!
Add new WorkSpace
Add New WorkSpace Info
Add Work Item
Also you can find information about the Eclipse integration in Team Foundation Server in the next WebCast, I found very interesting this WebCast, because of the real integration, and the low TCO tool. WebCast: Eclipse Integration with Team Foundation Server
Beers for all the IBM baby's