Jalopy, which I wrote about here, is now closed source. It’s about $40 for a single user license. For more info, see the corporate website. I see that the open source version is still around, though there hasn’t been a release since 1.02, about 18 months (about the same as xdoclet actually).
I totally respect Hunsicker Marco (who is the developer, I think and certainly the owner of the corporate domain) and his right to earn a living. $40 certainly isn’t that much (in fact, he even has a link to the old, free version on his purchase page!), but I hope that he eventually rolls the improvements into the free version, a la ESR’s “Free The Future, Sell the Present” business model.