How to access Team Foundation Server (TFS) from Linux
Team Explorer Everywhere - http://www.microsoft.com/visualstudio/en-us/products/2010-editions/team-explorer-everywhere
Not free, but if you use Eclipse
TeamPrise Microsoft has a plugin to connect to TFS, Team Explorer Everywhere, download at http://www.microsoft.com/en-us/download/details.aspx?id=30661. There is also a Java-based command line client that should work on Linux.