Please check out
https://www.gamestructor.com
I have created this site to allow people to create game boards, decks, and dice. After you create your game components you can host your own game room and play it online. There are games within the site's library you can test out. There aren't any rule engines in the games, but it's up to the users to enforce game play just like a normal board game. I've used this to play my favorite a civil war game with much success.
This is in beta so please let me know if you find any bugs or have some feedback.
Have fun!