- adopt - adopt is a damn option parsing library
- adopt-subcommands - Extend the Adopt command line processing library to handle nested subcommands
- Apply-argv - Apply-argv is a lightweight command-line options parser library
- argparse - simple argument parser library for common lisp
- Clon - There are three packages by the name of CLON, although the third one doesn't actually introduce any conflict because the package is named net.didierverna.clon
- command-line-arguments - command-line-arguments is a library to parse arguments from the shell command-line
- getopt - getopt is a library for processing command-line arguments
- lisp-gflags - Lisp GFlags is a Common Lisp implementation of gflags, Google's command line
- optparser - optparser is a Unix command-line options parser for simple shell scripts, geared towards ease-of-use and unambiguity
- unix-options - unix-options is a library for processing Unix-style command-line arguments
- unix-opts - This is a minimalistic parser of command line options
command-line options parser
Here is a list of command-line options parsing libraries. Those libraries are useful for creating standalone Lisp programs.