Spruce is an ASP.NET MVC 3 frontend for managing work items in Team Foundation Server 2010. It is influenced by Bitbucket, Fogbugz and other simple to use bug tracking systems.
You will need the .NET Framework 3.5 and TFS 2010 in order for it to work.
These details are provided for information only. No information here is legal advice and should not be used as such.