Team Foundation Power Tools [link] [free]
These tools are now installed on our developer seats by default. They add Windows Explorer access to TFS and a number of very helpful additions to Team Explorer inside Visual Studio.Even if your team members don't really use the functionality inside Team Foundation Power Tools, have them install it to distribute your check-in policies and custom work item controls. They'll come to like the additional features as time goes by.
Team Foundation Server Source Control Explorer Extension [link] [free]
What the Team Foundation Power Tools bring to Team Explorer and the command line, this add-in brings to the Source Control tab. A number of items which were previously only available through the command-line are made accessible directly from the Source Control tab. Delete files permanently, drag and drop support for copying and moving files, merge/copy/move multiple files. It also disables certain items in the context menu's when they're not available and fixes a few other things in there as well.