A very nice custom stylesheet (use with User CSS in Safari), specifically for Pinboard. Makes it a lot more attractive, but just as usable.

This is a handy Safari extension for posting to Pinboard.in, though it doesn't do anything the existing bookmarklets don't so far.

Collection of Safari extensions for the new Safari 5. I expect that extensions will really flourish over the next few months.

If you're a Firefox or Chrome user, this is an amazing extension to bring a LaunchBar/Quicksilver type of interface to web browsing, adding some very useful commands along the way.

Very cool idea: a kind of bookmarklet commandline for your browser. This replaces a load of bookmarklets for me, so should make the bookmarks bar a bit less crowded.

If you use Firefox, this saves having a collection of other bookmarklets or toolbar buttons for a variety of services.

A very interesting and accessible-looking project, showing once again how brilliant jQuery is.

A comparison of the features of two of the social bookmarking sites.

Useful list of hidden preferences for Camino to set in the user file.