Internet Board Game Reccomendations

Hey all! I'm currently living with a couple roommates, and we like to play board games (wiz wars, ticket to ride, risk, etc.). Some of them are moving out soon, and I was wondering if anyone had any recommendations for an online game (could be web based, steam based, etc) that would lets us continue to have this board game like experience. I'm looking for something that would let one individual take their turn, then the next player could take the turn in a couple minutes, hours, days, etc... Something that could be played in spare time quickly or during workday over large periods of time and still remain fun, and easy to follow.

Looking for any suggestions, I'm not even sure what type of genre that would be considered to do my own search.

Thanks all.