Backstory: I decided to crowdsource static site generator recommendations, so the following are actual real world suggested-to-me results. I then took those and sorted them by language/server and, just for a decent relative metric, their Github Watcher count. If you want a heap of other projects (including other languages like Haskell and Python) Nanoc has the mother of all site generator lists. If you recommend another one, by all means add a comment.
Run like so:
node gist-clone-all.js username
You'll want to replace "username" with your own username.
This script clones using the push URL, so you should probably be the owner of the gists. You could also use this to clone someone else's gists, but in that case you may wish to edit the code to use