Today I came across an excellent list of VSTS add-ons/add-ins/widgets/clients/etc. The list can be found at http://teamsystemexperts.com/widgets.aspx.

One of the more interesting sections in the list is the list of additional clients that are available for the Team Foundation Server source control repository. The list includes integrated clients for Visual Studio .Net 2003, Eclipse, SQL Server Management Studio, and there is even a Tortoise client. Tortoise source control clients are shell extensions that fit seamlessly into Windows Explorer and is my favorite way to work with cvs and subversion repositories.

Also in the list of utilities is the Team Foundation PowerToys. The PowerToys add some additional capabilities to VSTS that did not ship with the initial release. Added functionality includes things like Unshelve + Merge, Rollbacks, Undo Unchanged, and Get Changeset. The PowerToys were written by a Microsoft dev but are not officially supported by Microsoft.

If you are using Visual Studio Team System I highly recommend checking out this list of add-ons. There are many more tools on the site that I didn't highlight here including tools for Continuous Integration and MSBuild.