Maybe PFR other ones seem too competitive or not that interesting we don't need more privacy or smart contracts and ticketing and shopping is just a website trying to use crypto to get rich. Publica doesn't interest me seems like a long way out for a lot of authors to use it. Quarkchain may be a good bet if they are doing anything like EOS.

Escrow is not that many competition I've used escrow.com we need that for crypto but its also not that appealing. You should dig deeper.