All Open Source frameworks / tools are hosted on CodePlex website with their source code.  CodePlex forums of these open source frameworks are actively monitored for any discussions or issues raised.  You will find lot of code samples on this website and usage examples as well. Feel free to download them and distribute as per the license terms associated with these frameworks / tools.

CInject (GPL v2)
dI.Hook (GPL v2)
Workflow Extractor (Ms-PL)