Eclipse

Eclipse is an open source platform-independent software framework for delivering "rich-client" applications. It's most common use is for developing IDEs (Integrated Development Environments). Many notable software tool vendors have embraced Eclipse as a future framework for their IDEs, among them Borland and IBM Rational.

TopBraid Composer is also based on Eclipse.

Eclipse is managed by the Eclipse Foundation, an independent not-for-profit consortium of software industry vendors.