Does MSTest have standalone GUI similar to nUnit that lets me use it and run test without visual studio? What is the official site for MSTest where I can learn more about how to use it?
MSTest can be used without installing Visual Studio. You will need to install Visual Studio Test Agent, which is a free download from Microsoft.
I think this approach is better from a licensing perspective than manually copying MSTest.exe and its dependencies onto the build server.
See this blog for reference: http://blogs.msdn.com/b/anutthara/archive/2009/12/16/running-tests-in-mstest-without-installing-the-vs-ide.aspx