But OP asking for no need registration and deposit, so may be nitrogensports wont be include in this. Nitrogen sports sure have good design compare to directbet but still if you want some simple way to bet, directbet will still be no 1. There is no one can really beat them due to their simply way of betting
then maybe luckyb.it and satoshibones inlcuded right?
op didn't describe specify whether it's sportsbook or just a games only
he just stated a betting site no registration required
so maybe both sites i mentioned above what op looking for too?