Blank Canvas lets you manage, edit Greasemonkey userscripts in Google Chrome
Blank Canvas Script Handler is an excellent extension to install if you browse with a number of userscripts. Install the extension and a script icon appears in your browser actions area. Click it to display your installed scripts, see what features they utilize, and see where they run. You can also enable and disable scripts, delete them, and edit their source code.
Developer Jerome Dane also hopes to implement all the Greasemonkey functions that are missing in Google Chrome. As Jerome puts it, "Even though Chrome now supports installing user scripts as extensions, they completely left out support for most of the syntax that script writers have been using for years now, so most scripts would have to be redone to work with Chrome."
You can find Blank Canvas in the Google Chrome Extensions Gallery. It's a must-have for userscript fans.