I set up the Bazaar distributed version control system on three machines today (two Macs and one Debian), after Kevin mentioned it a couple of weeks ago. Iplayed around with merging and branching - it seems pretty similar to Git, and I'm not sure what all of the advantages and disadvantages are. Git seems marginally faster, but Bazaar seems to be simpler to install on different platforms (it has a native Windows version, and doesn't need Cygwin like Git does). On OS X and Linux, Bazaar's installation was as simple as Git's.

To get SSH support in Bazaar, it needs the pycrypto and paramiko Python libraries installed. They're available from Debian's repository, but on OS X, I had to install them manually.

I plan on using Bazaar for Wildcat COBOL's version control, so I'll be able to give a more detailed account of how good I think it is and compare it to Subversion later.