If you use .NET open source libraries in your development, you need to take a look at hornget – The Horn Package Management Project. Its initial goal is to provide a way to download and build popular .NET open source libraries, like Sharp Architecture and NHibernate, automatically resolving all necessary dependencies. The project is in very early stages and very rough around the edges. However, when you consider the couple of hours it takes to do something like upgrading Sharp Architecture to Fluent NHibernate 1.0 (as I did recently), you can see why something like hornget would be quite useful. I certainly intend to keep my eye on this one and, if time permits, at least contribute some testing effort.