PerlPad

PerlPad is a Cocoa application that lets users run Perl from other apps using System Services. Perl code can be evaluated from any TextInput, current selection can be processed with some Perl code (nice to test some regex), or users can process the system pasteboard in the same way. Buttons can even be defined for favorite Perl snippets along with add-on services for the service menu. The Perl environment provided is persistent (as long as the app stays alive), allowing data to be shared between invocations and custom Perl modules to be loaded.