Pydev is a product of Aptana, maker of the popular Aptana Studio, Eclipse-based IDE for Ajax, Jaxer, Ruby on Rails, and PHP. You can plug Pydev into Aptana Studio or both into Eclipse and use them side by side. See the news.

What happened to Pydev Extensions?

Pydev Extensions is now merged with Pydev, and its once closed source code has become open source. Thus, there is no more Pydev Extensions, only the open-source Pydev, with all the capabilities of Pydev Extensions incorporated.

License: EPL (Eclipse Public License)

See: http://www.eclipse.org/legal/epl-v10.html