JyDT for Eclipse aims to provide the development tools expected by a Jython developer. The project was started by Red Robin in November 2003 and is carried out with limited resources. The project has gone open source in July 2005. The project is hosted on redrobinsoftware.net since April 2006. The evolution of JyDT is driven by the needs of the users.
'Pydev Extensions' is a plugin that allows Python editing in Eclipse. It works with Eclipse and the Pydev "Open Source" version. You can check some of its features below.
PyDev is a plugin that enables users to use Eclipse for Python and Jython development -- making Eclipse a first class Python IDE -- It comes with many goodies such as code completion, syntax highlighting, syntax analysis, refactor, debug and many others. If you want more details on the provided features, you can check here.