Castle aspires to simplify the development of enterprise and web applications. Offering a set of tools (working together or independently) and integration with other open source projects, Castle helps you get more done with less code.
Ninject is an ultra-lightweight, ultra-fast dependency injection framework for .NET 2.0 applications. Easy to use, fast, flexible, and powerful, Ninject aims to make inversion of control accessible to all types of .NET projects, regardless of size or complexity.
The Common Service Locator library contains a shared interface for service location which application and framework developers can reference. The library provides an abstraction over IoC containers and service locators. Using the library allows an application to indirectly access the capabilities
... [More] without relying on hard references. The hope is that using this library, third-party applications and frameworks can begin to leverage IoC/Service Location without tying themselves down to a specific implementation. [Less]