From IICM

Below is a list of special gadgets users can enable on their preferences page, as defined by the definitions. This overview provides easy access to the system message pages that define each gadget's description and code.

browsing-gadgets     [Edit]

• Navigation popups, article previews and editing functions popup when hovering over links     [Edit]
  Uses: Gadget-popups.js, Gadget-navpop.css

editing-gadgets     [Edit]

• Friendly, a set of tools for Firefox, Safari, and Opera that automates some of Wikipedia's more friendly, collaboration oriented tasks, such as welcoming new users.     [Edit]
  Uses: Gadget-Friendly.js
• HotCat, easily add / remove / change a category on a page, with name suggestion [example]     [Edit]
  Uses: Gadget-HotCat.js
• refTools, adds a "cite" button to the editing toolbar for quick and easy addition of commonly used citation templates.     [Edit]
  Uses: Gadget-refToolbar.js
• Twinkle, a set of tools for Firefox, Safari, and Opera that automates common tasks such as reporting vandalism, warning vandals, and requesting deletion.     [Edit]
  Uses: Gadget-Twinkle.js
• wikEd, a full-featured integrated text editor for Firefox, Safari, and Google Chrome. Please read the help page for usage instructions.     [Edit]
  Uses: Gadget-wikEd.js

interface-gadgets     [Edit]

• Add a "*" tab to the top of the page, which purges the page's cache when followed.     [Edit]
  Uses: Gadget-purgetab.js
• Add a clock in the personal toolbar that displays the current time in UTC. (also provides a link to purge the current page)     [Edit]
  Uses: Gadget-UTCLiveClock.js
• Add an [edit] link for the lead section of a page     [Edit]
  Uses: Gadget-edittop.js
• Add page and user options to drop-down menus on the toolbar. Works in Monobook and Modern skins. (documentation)     [Edit]
  Uses: Gadget-dropdown-menus.js, Gadget-dropdown-menus.css
• After rolling back an edit, automatically open the contributions of the user rolled back.     [Edit]
  Uses: Gadget-modrollback.js
• Allow /16 and /24 – /32 CIDR ranges on Special:Contributions forms (uses API), as well as wildcard prefix searches, e.g., "Splark*". (Please report any issues here.)     [Edit]
  Uses: Gadget-contribsrange.js
• Allow up to 50 more characters in each of your edit summaries. Works in Internet Explorer, Firefox, and Opera.     [Edit]
  Uses: Gadget-LongEditSummaries.js
• Change the "new section" tab text to instead display the much narrower "+".     [Edit]
  Uses: Gadget-addsection-plus.js
• Change UTC-based times and dates, such as those used in signatures, to be relative to local time. (documentation)     [Edit]
  Uses: Gadget-CommentsInLocalTime.js
• Disable access keys     [Edit]
  Uses: Gadget-removeAccessKeys.js
• Display an assessment of an article's quality as part of the page header for each article. (documentation)     [Edit]
  Uses: Gadget-metadata.js
• Focus the cursor in the search bar on loading the Main Page.     [Edit]
  Uses: Gadget-searchFocus.js
• Make text fields (e.g. the edit form) use a sans-serif font instead of a monospace font.     [Edit]
  Uses: Gadget-textareasansserif.css
• Open external links in a new tab/window     [Edit]
  Uses: Gadget-exlinks.js
• Use a black background with green text on the Monobook skin     [Edit]
  Uses: Gadget-Blackskin.css

library-gadgets     [Edit]

• Compatibility function to run scripts only tested on Monobook on the new Modern skin. Required for using Twinkle or Friendly (along with many other scripts) with the Modern skin.     [Edit]
  Uses: Gadget-modernskin-thunks.js
• DejaVu Sans, a font with support for various dingbats. This gadget will only work on Safari. Install this gadget if you need better font and character support but cannot install fonts directly onto your computer.     [Edit]
  Uses: Gadget-DejaVu Sans.css
• The JavaScript Standard Library, a compatibility library for browsers that lack full support for JavaScript 1.6. This includes Internet Explorer, Opera, and Safari.     [Edit]
  Uses: Gadget-JSL.js