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Jakarta Commons CLI
The Apache Commons CLI library provides an API for processing command line interfaces. There are three stages to command line processing. They are the definition, parsing and interrogation stages. 

License Apache Software License 
HomePage http://jakarta.apache.org/commons/cli/

ArgParser
ArgParser is a Java package, which can be used to specify command line options for a Java application. It has support for range checking, multiple option names (aliases), single word options, multiple values associated with an option, multiple option invocation, generating help information, custom argument parsing, and reading arguments from a file. 

License Other 
HomePage http://www.cs.ubc.ca/spider/lloyd/java/argparser.html

JArgs
JArgs is a comprehensive command line option parsing suite, for use by Java programmers. Initially, parsing compatible with GNU-style ‘getopt’ is provided. JArgs is easy to use, thoroughly tested and well documented.

License BSD License 
HomePage http://jargs.sourceforge.net/

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