Command Line Parsers
LineArgs is a simple implementation of command line arguments parser based on annotations/metadata. A .NET version with the same API is also available.
Java annotation-based framework for parsing Git like command line structures
CLI-Parsec is a declarative CLI-Parser-Framework for Java. It is based on annotations and aims to ease defining and parsing command line interfaces.
A Java library to support command-line apps, including daemonization support.
Git-like-cli is a Java annotation-based framework for parsing Git like command line structures. Based on Dain Sundstrom's git-like-cli (http://github.com/dain/git-like-cli)
Library supporting an implementation of command line interface for Java applications
cli-util is an extension of apache common's java command line interface (commons-cli) library. It adds sub commands, more type safely and a declarative style for defining commands, their options, flags and arguments.