The venerable Eclipse open source development environment started just an alternative to the Microsoft Visual Studio. It has since grown well beyond those boundaries by becoming an enterprise grade integrated development tool for all stages of the software development lifecycle including Web development, database engineering, and Business Intelligence (BI) reporting. The Eclipse project is a perfect model of the power of the Open Source community with corporate backing by IBM.
For executives looking to save money on licensing of software tools, take a look at Eclipse and all its goodness.