This really depends on what you'll be using the
wiki for and whether
it's public or not. However, for a general idea of what others have
installed, you can see a list of popular extensions on WikiApiary
here:
https://wikiapiary.com/wiki/Extension:Extensions
Hello,
We also have a dashboard showing the most downloaded extensions from
Extension Distributor over the last 30 days:
Note the MediaWiki tarballs come with bundled extensions as well. For
1.26.x they are:
All other, it really depends on what your wiki is going to be used for :-}
--
Antoine "hashar" Musso