Ricardo Signes' App::Cmd has been praised a lot so I gave it a try for my recent command line app. In summary, the module is great although I missed some minor features and documentation (reminder to all: if you miss some feature in a CPAN module, don't create yet another module but try to improve the existing one!). One feature I like a lot is how App::Cmd facilitates writing tests for command line apps. After having written a short wrapper around App::Cmd::Tester my formerly ugly unit tests look very simple and clean. Have a look at this example: