Userscripts.org

Adds a tab to the Stack Overflow navigation that shows most recent interesting questions

Add reply links to comments

For http://meta.codereview.stackexchange.com/q/33/697

Plays a sound when a new question is detected that matches your interesting tags. Also refreshes the page constantly so that you can be automatically notified.

Replaces dull voting arrows on Stack Overflow with something more appropriate.

Configurable helper to enable a quicker retagging of questions at Stack Overflow

Enables the "View vote counts" feature on the Stack Exchange websites, without requiring any reputation or an account.

Click [StackOverflow logo] to sort by votes.

This script allows you to collapse or hide deleted answers on StackOverflow

Bind the 'f' accesskey to the search box on Stack Exchange sites

Adds unread questions counter to favicon

Adds embedded jsFiddle content to the questions/answers posts.

See your webpage from 10,000 feet! Generates a cool mini-map of the entire current webpage which the user can use to navigate with drag and scroll while it correspondingly tracks the user's position.

Makes the stackoverflow top bar stay fixed to the top of the window and shrink when scrolled down.

Puts markers next to questions that haven't been read