Is there such a thing as Greasemonkey for Safari?
You can use SIMBL and GreaseKit to run most Greasemonkey scripts in Safari, unmodified. Detailed installation instructions are found at this link, repeated here:
- Download and install SIMBL
- Quit Safari
- Download GreaseKit
- Drag the GreaseKit.bundle file to
~/Library/Application Support/SIMBL/Plugins. You may need to create this location if it doesn't exit
- Start Safari and you'll see a GreaseKit menu bar item
- Install scripts from http://userscripts.org -- the installation process is a little different from the Firefox approach, but it works.
The native-to-Safari equivalent of Greasemonkey is AppleScript extensions and plugins. For a nice library of native Safari extensions check out Pimp My Safari.