[jxbsbdbd]

These are a dime a dozen. Jet non of them has any significant share in the pure wiki space

[aakkaakk]

Name a few of them.

[zahlman]

https://duckduckgo.com/?q=markdown+based+wiki

People can't name them off the top of their heads, exactly because none of them have caught on. But they're easy to find.