Bazaar, or baz, is a GnuArch derivate, which claims to work more towards user-friendliness than the predecessor, and has as one of its goals "seamless upgrade path to" BazaarNg. Sponsored by CanonicalLtd.
Official web page: http://www.bazaar-vcs.org/
Does it use a MeshTopology?, like Git? Note that repudiates the classical StarTopology? of SVN, CSV, Perforce, etc...