Note: as mentioned by Kent Beck himself, the Junit Max project is no longer actively developed. This blog post summarizes it (July 2009):
I wrote about JUnit Max in a previous post. In that post I commented that I was not sure if people were willing to pay $2/month for it. It turned out that I was right. Kent Beck just announced that he has deadpooled JUnit Max.
Ken adds:
The conundrum I faced was how to market without any cash.
I do have my reputation–people will (briefly) listen to what I say. That’s why I used the media I used. Actually, if I had to do it over again I would attach my name less prominently to the product.
Some people bought Max because it was a tool I produced, not because it was a tool they really thought they needed, and that delayed clear feedback. The signal that clinched the decision to deadpool Max was the lack of word-of-mouth. Subscribers were telling their friends, but their friends weren’t buying.
That being said, he is planing to get Juint Max back, as he says himself in an vlog interview last week (July 2d, 2010): (new release mid or end July?).
So, right now, for large workspaces with many large projects, Infinitest might scale better. (but I have no direct experience of it).
It isn’t open source, but for personal use it should be possible get a free of charge individual license. (see the dual licensing model for Infinitest).