Can anyone suggest some useful MediaWiki extensions? I've installed PDF export, syntax highlight, file link protocol, submit in toolbar and enforce strong password. But I'm still eager to know any good/handy extensions.
Like pQd wrote, it depends on the wiki's purpose. However, you can take a look at the extensions being used on Wikipedia and Wikia by going to these pages. Click on a few of them that you think might be useful on your site to check them out. And since Wikipedia is using them, you can be sure the extensions are stable.
it all depends what you use the wiki for. i'm quie happy user of semantic medawiki extension. it gives me idea to organize and query information stored in the wiki.