Userscripts.org

Removes the redirects from Google search results to prevent Google from tracking which links you clicked.

Add an anonymizer (http://anonym.to) link to the google results

Filter the search results

This script transforms evil Google Search result redirects to take place on left click only (so that you can copy the URL with a right click or avoid the redirect with a middle click) or removes them altogether.

Highlight search keywords in the result of Google search.

Add a drop-down list for changing language used Google search.

Adds a box to the page where you can test JavaScript expressions in realtime

Add a custom filter set to append to every google search, and comes with a toggle in user script commands

Advanced keyboard navigation for Google search services. Script is compatible with Customize Google extension and does not break "find as you type" Firefox option, supports Steam search and redesign userstyles. <b>New: autoupdate notification!</b>

Version 1.2.7 Navigate google results using keyboard. Currently Web, Images, Groups and News pages are supported. Press H for more help.

Yahoo! Mail: Skip virus scan result page when viewing attachment (of course only when there is no virus). The download attachment dialog will start immediately without needing to click on the "Download Attachment" button.