Somebody was asking on IRC earlier about what parsers there are for MediaWiki's brand of wikitext, other than the bits of the MediaWiki code that do it (which I suggested would be pretty painful to seperate from the rest of it).
As I thought about it, and looked around, I realised that there were actually quite a few of these about, mostly in unfinished states, but generally usable for simple tasks and/or as the basis for somebody else's attempt. So, as an attempt to minimise duplication of effort, I thought I'd make a list of what was out there.
This is therefore both an announcement that I've started the list, and an invitation for anyone who knows of something I've missed/got wrong to add it in/correct it. I hope this proves useful for someone someday.
The list is at http://meta.wikimedia.org/wiki/Alternative_parsers