Pixeldyne Core is a small library (written in C#) used for scaffolding .NET development-based projects. It is by no means production ready (on account of missing unit tests), but it does provide reusable code, saving you time re-implementing most common patterns.
It is open source and licenced under Apache Licence 2.0, thus providing the best benefits to individuals and organisations using these works in proprietary commercial projects (open or closed source, the decision is up to the user).
I’m currently in the process of refactoring the library to use .NET 4.5, especially contracts, parallellisation and asynchronous operations.
Additionally, a new SharePoint 2010 web service proxy will soon be added, allowing developers to efficiently manage documents from .NET 4 or 4.5 applications (x86 or x64).