After a snap search I couldn’t find the link on the forums so here it is:
I’ve been looking to add a wiki to an intranet, but I had several requests; it needed to be php, using an sql db and localized (in french) and open-source. Being the total noob I am I couldn’t find what I wanted on the web (except mediawiki - the one used by wikipedia). So I stumbled upon wikimatrix, which is awesome and simple to use, to find out what wiki engine you use. And it has more details than you can ever imagine.
There’s also a forum comparison engine made by the same people.
I really recommend this site !