- Tab Duplicator - creates a duplicate of the current tab
- ctrlSwitcher adds CTRL-number tab navigation
- Optimize Legibility injects a single CSS attribute (text-rendering:optimizeLegibility) into every page
- FocusOnTheUser to replace Google+ Profiles in Google search results with the most relevant social profiles
- BetterSource shows the document source in a new tab, with line numbers, and colour syntax highlighting.
- GoogleClickTracker (to disable the click tracker on Google Search results, mostly for copy & paste)
- User CSS to disable annoying elements (previously to revert the colour of Google Reader links to blue)
- MetaFilter Multifavorited Multiwidth (converted from Greasemonkey) used to highlight comments on MetaFilter properties with multiple favorites
- UTM Stripper in my crusade against URL cruft
- Slipstream to mute some people, hashtags, terms on my Twitter timeline
- Handoff to send tabs from my computer to my iOS device(s)
- Embedly to show content inline. Sometimes, when the thing linked to is short text (but longer than 140 characters), it works effectively as a "long tweet". Does it work with NewNewTwitter?
- Instafari for sending links to Instapaper