Located at http://www.springframework.net/
On 2008-04-05, it says "Led and sustained by SpringSource, Spring.NET is an open source application framework that makes building enterprise .NET applications easier. Providing components based on proven design patterns that can be integrated into all tiers of your application architecture, Spring helps increase development productivity and improve application quality and performance."
Has anyone used Cobra with Spring.NET? If so, tell us about it in the forums and/or here.