Agitar has launched a plug-in to Eclipse for test generation. The way it works is that your code is sent to their server where tests are generated and returned to you. The tests are generated by the same technology that is used in AgitarOne. Since it is experimental, it can even contain features that are not available in the commercial Agitar products yet.
I have just tested JUnit Factory on simple classes but it seems excellent! The test code looks fine, all your tests are listed with status information. You even get a coverage report and coverage markers in your code.
The only catch I have found so far is that you have to be online to be able to generate new tests. I found that out when I tried to test the plug-in while I was working offline on the train yesterday…
More information and request for download can be found on http://www.junitfactory.com/