This looks really cool. It's a little less powerful than I first though (i.e. able to completely edit the right-click menu), but given that it works through the Apple-supported Services pathway, means that it's less likely to cause problems, as some other extensions do that use private APIs, and yet still usefully allows you to tweak open and working with file types.
Hi - this is my app. Thanks for submitting :)
Service Station is something I've always wanted, specifically to:
1. Open Terminal from Finder
2. Easily open random files in a text editor while keeping their default apps.
So I built it for the Mac!
Let me know if you have any feedback or issues.