Greasemonkey - Customize the way a web page displays or behaves, by using small bits of JavaScript.
YubNub - YubNub is a networking web service with a command line–style interface.
Violentmonkey - Violentmonkey is a userscript manager to support running userscripts in web pages.
Shortwave Bookmarklet - Shortwave is an extensible quick-search and shortcut bookmark.
GreaseKit - GreaseKit is a SIMBL plugin, that adds user scripting to Safari, Mailplane, Diet Pibb.
Shortwave - Email smarter & faster with a reinvented experience for your Gmail