I'm running MacPorts on my OS X box. These are some Portfiles I've been adding to my system.
$ rake
This will generate the PortIndex, install a new MacPorts source pointing at this directory, and set up a Git post-commit hook to regenerate the PortIndex any time you commit Portfile changes.
Now you can sudo port install guile19 and all sorts of goodies. For a
list of available local ports, try rake list. To manually update the
PortIndex (or to fix the Git hook, or the sources list), just run
rake again.
Fork and add your own.