Managing a private wiki/Extensions

Vanilla MediaWiki is quite limited in comparison to the wikis run by the Wikimedia Foundation. We use many extensions to get enhanced functionality; here are some you may wish to consider using:

Extension:CategoryTree
Dynamically navigate the category structure
Extension:CrossNamespaceLinks
Lists links across namespaces that should not exist on Wikiversity
Extension:ExpandTemplates
Expands templates, parser functions and variables to show expanded wikitext and preview rendered page
Extension:Renameuser
Adds a special page to rename a user (need renameuser right)
DynamicPageList
Outputs a bulleted list of the most recent items residing in a category, or an intersection of several categories
This one is really useful!
Extension:ImageMap
Allows client-side clickable image maps using <imagemap> tag
Extension:ParserFunctions
Enhance parser with logical functions
This one is really useful!
SyntaxHighlight
Provides syntax highlighting <source> using GeSHi Highlighter
mw:Extension:OggHandler
Handler for Ogg Theora and Vorbis files, with JavaScript player
Extension:AntiSpoof
Blocks the creation of accounts with mixed-script, confusing and similar usernames
Extension:ConfirmEdit & FancyCaptcha
Simple captcha implementation
Extension:Gadgets
Lets users select custom CSS and JavaScript gadgets in their preferences
Extension:MWSearch
MWSearch extension is a MediaWiki backend to fetch search results from MediaWiki Lucene-based search engine.
Extension:SpamBlacklist
Regex-based anti-spam tool
Can be quite difficult to use effectively; requires knowledge of regex
Extension:Title Blacklist
Allows administrators to forbid creation of pages (including uploads) and user accounts