Following is a chart that shows the array of companies offering Eclipse and Web Browser solutions for application development. I did not include Visual Studio in order to save space, it does not have as interesting an ecosystem IMO.
It is interesting how the enterprise type of developer that in years past used sophisticated tools like PowerBuilder is still attracted to a full fledged IDE, and the line of business / SMB type of developer that used to use tools like Microsoft Access and FileMaker Pro can now use a web browser. Microsoft has added a ton of features to Microsoft Access over the years, but the core functionality that most people use can now be easily replicated in a browser. With the addition of tools like Yahoo! Pipes and Microsoft's Popfly, the Web 2.0 wave has finally hit application development in a big way.