Managed Package Framework for Projects (MPFProj) released for VS 2012
The VS team recently released an update of the MPFProj sample sources to facilitate authoring custom project types for Visual Studio 2012. Including a link to each version below; as each is specific to a given version of the Visual Studio IDE.
VS/MSDN Documentation on Custom Project Types
Samples that leverage the MPFProj sources:
Note, the original MPFProj sources were first included in the Visual Studio SDK for VS 2008. And while it’s a bit dated, the IronPython Integration Deep Dive whitepaper is a good write up of the sample, including details on implementing the project system.