Re: What software exists to run a CoinJoin server? [Wasabi debacle]
It's not independent. Wasabi is built, developed, and maintained by zkSNACKs. zksnacks.com calls Wasabi their "flagship product", and the Wasabi code is on the zkSNACKs GitHub.
Yes, but the source code is released under the MIT license, wherein you're allowed to modify and distribute, which means it allows you to develop it. However, being hosted by zkSNACKs means you're going to have a hard time forking it and re-releasing it successfully, as far as I understand. Loycepup's Coin Cycling Club.
"Cycling Club" as a name for a mixing service does sound cool. 
I'm thinking of names: Loycabi? NotACoinJoin? CoinJoinAnything? TaintThis?
CoinJoy 