[datagrok]

I'm working on one that distinguishes itself by attempting to be language-agnostic, meaning the subcommands are just executables, implemented in any language: https://github.com/datagrok/subcommander

It's not meant to replace argparse; it's meant to provide a namespace mechanism for a system with lots of sub-commands.

I've been using it at work for over a year. Needs some more polish and some bugs fixed before I'd call it "releasable" though.

Another project with similar goals: https://github.com/37signals/sub