Ranchero Software has Big Cat, which allows you to call scripts from a contextual menu, on files in the Finder, or on text in many applications. You can process with compiled AppleScripts, or shell scripts (including Perl scripts).
Here's a perl script I keep in the Big Cat folder called "Set Type -≶ BBEdit".
Ahhhhhhhh.
Now Playing: Henry Kissinger - Monty Python (Sings)
What I'd love to use this for is a real right click root menu, like I used to use under X11/blackbox. I had every app I ever needed on that menu, including a folder containing an item which fired off a Konsole or other terminal ssh'ed into a specific host.
If this had the ability to organize your scripts in folders and were payware, I'd gladly pay for it.
Now I just need to find an AppleScript reference so I can write something that fires up Terminal.app and tells it to ssh somewhere.