NullReferenceException is a small IT-startup doing awesome things for Windows environments with open source software.
A free and open source BitTorrent client for Windows, written in C#. It runs headless as a Windows Service and has a powerful JSONRPC API.
A full-featured NNTP binary downloader for Windows, written in C#. Krang manages your watchlists and automatically looks up and retrieves any movies/shows you add to it.