Eclipsing .NET:

"The Eclipse Project
Visual Studio .NET is not the only option for exploring .NET in a commercial-quality integrated development environment (IDE); it's just the most expensive one. On November 5, 2001, IBM released the Eclipse project (with an estimated value of $40 million worth of software) to the open-source community. The project is now maintained by the Eclipse organization (www.eclipse.org). This open-source software provides a core, extensible infrastructure for building software development environments. It also provides a basic user interface and an open API that supports the extension of the product through its plug-in mechanism. Eclipse provides a framework for producing customized software development environments that can either be used internally by an organization or repackaged and sold commercially. In fact, the Eclipse framework is the foundation for IBM's new suite of WebSphere Workbench tools.