Apart from the fact that it does not support branches, this is in my opinion the perfect tool. It is fast, open souce and most importantly, it makes really easy to navigate, well thought out pages that just work. Because of the way OpenSolaris does file versions for their code, they don't use branches at all. OpenSolaris currently uses a linear method of file versioning, they don't use branches, they use versions as a sory of branch, basically the idea that Office 12 is the "2007 branch" and Office 11 is the "2003 branch". Mozilla doesn't do this, so it would be nessecary to implement this feature. Luckily, however, OpenGrok is very modularized and atomic in nature. If you go to the OpenGrok page, you can get a more complete explanation, but the basic jist of it is that there are many "Guru's", each with a task. The files are first read by the History Guru who looks at the file and decides what type of versioning the file uses. Once the versions have been analyzed, they are passed on to the file analyzer guru who then decides what type of file it is, and passes it on to a file type analyzer. The allows for portions of the code to be changed without changing the whole system, so if we wanted to be able to do special things with XUL/XPCOM as far as how to handle its symbols, we would write one module which is not dependent at all on any other file analyzer. The same way, if Mozilla switchs to SVN, we would just port the branching support to SVN. On the chances that Mozilla switches to something other than CVS or SVN, a HistoryGuru could be written for that type of versioning history. The OpenGrok project is under the [http://www.sun.com/cddl/ CDDL] which [http://www.sun.com/cddl/CDDL_MPL_redline.pdf derives from the MPL 1.1]