|-
! Extension
! Used by WMF projects?! What does it do? (explain functionality it provides by role: DCS Admin, client)
! Maintenance / Last release
! Used by WMF
! Used by Meza
! Used by QualityBox
! In use? Used by DCS Alternatives?
|-
| [https://www.mediawiki.org/wiki/Extension:CirrusSearch CirrusSearch]
| Yes
| Extends the core search for MediaWiki to be able to use [https://en.wikipedia.org/wiki/Elasticsearch Elasticsearch]
| Continuous
| Yes
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:Cite Cite]
| Bundled in the official tarball release of MediaWiki (aka 'the download').
| Provides <nowiki><references /> and <ref></ref></nowiki> tags
| Continuous
| Bundled in the official tarball release of MediaWiki (aka 'the download').
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:CiteThisPage CiteThisPage]
| Bundled
| Provides [https://demo.qualitybox.us/wiki/Special:CiteThisPage Cite This Page] Special Page.
| Continuous
| Bundled
| No
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:ConfirmEdit ConfirmEdit]
| Bundled
| Adds CAPTCHAs for page saves and other user actions to protect against spam and password-guessing
| Continuous
| Bundled
| No
| Yes
|-
| [https://www.mediawiki.org/wiki/Extension:Elastica Elastica]
| Yes
| Base Elasticsearch functionality by providing the Elastica library; required by CirrusSearch.
| Continuous
| Yes
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:Gadgets Gadgets]
| Bundled
| Provides a way for users to pick JavaScript or CSS based "gadgets" that other wiki users provide.
| Continuous
| Bundled
| No
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:ImageMap ImageMap]
| Bundled
| The ImageMap extension allows clickable image maps.
| Continuous
| Bundled
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:InputBox InputBox ]
| The InputBox extension adds already created HTML forms to wiki pages. So, for [https://www.mediawiki.org/wiki/MediaWiki_1.30#Subpages example], a search box on a page or category with many subpages; preconfigured to "Search this space".
| Bundled
| The InputBox extension adds already created HTML forms to wiki pages. So, for [https://www.mediawiki.org/wiki/MediaWiki_1.30#Subpages example], a search box on a page or category with many subpages; preconfigured to "Search this space".
| Continuous
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:Interwiki Interwiki]
| Bundled
| The Interwiki extension adds the "Special:Interwiki" page to MediaWiki, to view and edit the interwiki table, and a log of any actions made with it.
| Continuous
| Bundled
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:LocalisationUpdate LocalisationUpdate]
| Bundled
| Allows to update the localizations for MediaWiki messages at any time, without needing to upgrade the MediaWiki software.
| Continuous
| Bundled
| No
| No
|-
| [https://www.mediawiki.org/wiki/Extension:Nuke Nuke]
| Bundled
| The Nuke extension makes it possible for sysops to [https://demo.qualitybox.us/wiki/Special:Nuke mass delete pages].
| Continuous
| Bundled
| No
| Yes
|-
| [https://www.mediawiki.org/wiki/Extension:ParserFunctions ParserFunctions]
| Bundled
| Enhances the wikitext parser with helpful functions, mostly related to logic and string-handling.
| Continuous maintenance
| Bundled
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:PdfHandler PdfHandler]
| Bundled
| The PdfHandler extension shows uploaded pdf files in a multipage preview layout.
With the Proofread Page extension, pdfs can be displayed side-by-side with text. This allows users to transcribe books and other documents.
| Continuous
| Bundled
| Disabled
| Yes
|-
| [https://www.mediawiki.org/wiki/Extension:Pipe_Escape PipeEscape]
| Bundled
| The Pipe Escape extension allows for pipe characters in parser function arguments (and template argument calls) avoid being interpreted as an argument delimiter. This is primarily for the purpose of using wiki tables (or parts thereof) inside parser function calls or templates.
| Old but stable
| Bundled
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:Poem Poem]
| Bundled
| The Poem extension allows easy formatting of poems and similar material within Wikitext. Once the extension is enabled, you can put any block of text within <nowiki><poem></poem></nowiki> tags
| Continuous updates
| Bundled
| No
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:Renameuser Renameuser]
| Bundled
| The Renameuser extension provides a special page which allows authorized users to rename user accounts. This will cause page histories, etc. to be updated. If you want to rename an account "into" another, already existing one, you need the User Merge and Delete extension.
| Continuous updates
| Bundled
| No
| Yes
|-
| [https://www.mediawiki.org/wiki/Extension:SimpleMathJax SimpleMathJax]
| No, WMF uses the Math extension
| The SimpleMathJax extension enables MathJax, a Javascript library, for typesetting TeX formula in MediaWiki inside math environments. This extension will load resources from cdnjs.cloudflare.com on all wiki pages that have math or chem tags.
| Regular maintenance
| No, WMF uses the Math extension
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:SpamBlacklist SpamBlacklist]
| Bundled
| The SpamBlacklist extension prevents edits that contain URLs whose domains match regular expression patterns defined in specified files or wiki pages and registration by users using specified email addresses.
When someone tries to save a page, SpamBlacklist checks the text against a (potentially very large) list of illegal host names. If there is a match, the extension displays an error message to the user and refuses to save the page.
| Continuous updates
| Bundled
| No
| No
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:SyntaxHighlight SyntaxHighlight_GeSHi] (now known simply as SyntaxHighlight)
| Bundled
| Provides rich formatting of source code using the <nowiki><syntaxhighlight></nowiki> tag. It is powered by the Pygments library and supports hundreds of different programming languages and file formats.
| continuous updates
| Bundled
| Yes
| Yes
|- style="background:#90989e;"
| [https://www.mediawiki.org/wiki/Extension:TitleBlacklist TitleBlacklist]
| Bundled
| Combat spam and vandalism. Allows wiki administrators to block the creation, movement and upload of pages, the title of which matches one or more regular expressions, as well as blocking creation of accounts with matching usernames. (Prevent account creation by "he who shall not be named" or prevent pages like "Sh*t".
| 1.5.0 (2014-03-29) some oversight by WMF
| Bundled
| No
| No
|-
| [https://www.mediawiki.org/wiki/Extension:WikiEditor WikiEditor]
| Bundled
| The WikiEditor extension provides an improved interface for editing wikitext. It is the wikitext editing interface that Wikipedia started using in 2010 for desktop users, and so it is sometimes called the "2010 wikitext editor".
| 0.5.1 (2016-04-15) some oversight by WMF
| Bundled
| Yes
| Yes