First of all, on http://egobits1.github.io/wiki/, you may find two buttons (labled 1 & 2) which lead you to two new, purely Jekyll and markdown based potential alternatives to mediawiki. I also wanted to include a fresh mediawiki and dokuwiki version for comparison, though this was apperantly not possible.
Now, regarding the two new wiki's:
The first one is simple. I mean REALLY simple. You have a bar on the left to select topics, it may be edited via prose.io and everything works without JS.
The second one is more interesting here. Not only does it have a unique and interesting look, as well as nice effects, it is also smaller, easier to edit (because the folder structure is even simpler) and just gerenally looks more professional.
However, it uses JS for the effects. The thing is though, that after messing with it for some time, this seems to not be an issue anymore, as not accepting JS won't lead to the site beeing inaccessible (like the forum), but just look more simplistic with less effects. And even then it arguably looks better than solution one.
So, in summary, I'd apprichiate a bit of input here, what fits better, what could/should be changed, and so on.
Have a nice day,
P.S.: I admittedly didn't look trough the complete list, though a lot of files I got from the backup you linked where sadly rather empty, only containing a few lines of code...
P.P.S.: Just noticed that I pushed the wrong "build" (if you can even call it that) of the first wiki and now nothing works, am currently fixing that...
P.P.P.S.: Should work now.