Userscripts.org

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

prevents the "Welcome" bar from popping up on StackExchange sites (stackoverflow.com, serverfault, etc.)

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

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

Enhances http://stackoverflow.com, http://meta.stackoverflow.com, http://superuser.com, and http://serverfault.com.

Hides questions on the home page and main question list which have certain uninteresting tags, unless they also have some interesting tags

Show threaded comments on Stack Overflow and other Stack Exchange sites

Let Commander Keen do the downvoting

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

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

Add reply links to comments

StackPrinter - The Stack Exchange Printer Suite.

Try to guess alignment of RTL posts on the Stack Overflow Chat

This userscript will add a 'stackoverflow' tag to delicious bookmarks for stackoverflow.com, when you save them.

This userscript will remove the redunant x's beside tag names in StackOverflow's right nav.

This userscript will update the ask a question form on StackOverflow to use @placeholder, instead of their wacky junk.

This userscript will switch the comment text box and preview area so that the preview area is above the text box area.

Save question to Delicious

Removes full URL validation of OpenID login field in Google Chrome

Searchbox for searching through the answers on the current question

This userscript will add a 'question' tag to delicious bookmarks when you save them.

Moves the prefix on "views" up so it's next to the actual number on Stack Overflow and related websites. Not necessary on Stack Exchange sites.

This userscript will hide job ads at Stack Overflow.

Give the user the choice which language to use for syntax highlighting

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.

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

This script cleans up the UI of the StackOverflow website.

Puts markers next to questions that haven't been read

Makes non-internal SOFU links open in a new tab or window