Stake is an online casino that accepts Bitcoin, Ethereum and Litecoin. An outstanding platform with great design. All proprietary games are provably fair.
Bitcasino.io was established in 2014 and since then has kept its solid place on the best Bitcoin casinos shortlist. The quality of the platform is visible in everything from the design, to the games, their sportsbook and the whole company structure by itself. They are part of a bigger ambitious project called the Coingaming Group, which is responsible for powering their casino, sportsbook and promises to deliver more content in the future.
OneHash is a remarkable achievement regarding online casino, sports betting, live markets and pretty much any prediction market you can think of (to a fair degree obviously).