Kent Beck has released JUnitMax.

“JUnit Max is an Eclipse plug-in that helps programmers stay focused on coding by running tests intelligently and reporting results unobtrusively. Every time you save a Java file, Max will run your tests and report errors like compile errors. In addition, Max runs the tests most likely to fail first, so you only have to pay close attention to test results for a second (literally) before getting back to coding, even if you have a long-running test suite.”

Running tests in the background is nothing new. A continuous testing plugin for Eclipse has existed for a while. What is new here is the logic deciding in which order the tests should run. But I am not sure people are willing to pay $2/month for it. There are too many free tools out there… I will be waiting for the NetBeans plugin before i give it a try anyway…