Hi, FishEye is another Atlassian tool for software development. It's an advanced repository browsing tool that's especially nice when you want to compare the revision history of a file across multiple branches. Free FishEye hosting for open source projects is available at http://fisheye.cenqua.com/ and I plan to request them to add FishEye support also for Jackrabbit.
BR, Jukka Zitting