dubtokens is one I'm really interested in. No minimum cap for the ICO. What I like is that it's combatting ad fraud using blockchain technology, so I think it's a good and timely project to get behind. There's a video demo on their website, which is so cool.
I'm sure if you search for the dubtoken bounty you'll find it. I'm also in the telegram chat for them, and it's a bit more active than the bitcointalk post, but all the details for the bounty are here.