Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.
A lightweight and flexible library for building command-line interfaces (CLIs) in Go. This library provides a simple and intuitive way to define commands, flags (including short names), aliases and more.