PSHamcrest
PSHamcrest is a very basic Powershell unit test framework inspired by Hamcrest.
Codeplex Page:
http://pshamcrest.codeplex.com/
Latest release:
http://pshamcrest.codeplex.com/releases
Browse the latest source code:
http://pshamcrest.codeplex.com/SourceControl/BrowseLatest