JetBrains is going to release their unit testing tool ReSharper UnitRun as a stand-alone application and it will be freeware. As a ReSharper user I'm using it for quite some time now. And, as with all the JetBrains tools, I don't want to miss it.

Here is the announcement of the Early Access Program:

We are glad to announce opening of Early Access Program for our new product -- ReSharper UnitRun. This product is basically ReSharper's unit testing functionality released separately that will be available for free. At JetBrains we believe that developers should have free tools supporting their basic needs and recent development of TDD makes unit test runners a part of the basic package.  The software is free, you only will be asked to register on the first use. You may cancel the registration in which case you will be able to use the add-in for 30 days without registration prompt.

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Go now and download it from our EAP download page: http://www.jetbrains.net/confluence/display/ReSharper/Download