clap-rs / clap

A full featured, fast Command Line Argument Parser for Rust

sigoden / argc

A Bash CLI framework, also a Bash command runner.

Taywee / args

A header-only C++ argument parser library. Supposed to be flexible and powerful, and attempts to be compatible with the functionality of the Python standard argparse library (though not necessarily the API).

wvlet / airframe

Essential Building Blocks for Scala