clap-rs / clap

A full featured, fast Command Line Argument Parser for Rust

alexflint / go-arg

Struct-based argument parsing in Go

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).

matejak / argbash

Bash argument parsing code generator