Gofer is a small tool on top of Monticello that loads, updates, merges, diffs, reverts, commits, recompiles and unloads groups of Monticello packages. If you work with Pharo or Gemstone you may already know it.
Interesting that in the newest version you get git like behavior where you can pull published packages into the local cache. If you work offline you can later push your changes easily back into the repository. Read more here.