XAUR is backed by gold
https://coinmarketcap.com/currencies/xaurum/There is also a project by the Populous Team which is named XAUP, I think its not yet on the market right now. This is the ANN thread of this project
https://bitcointalk.org/index.php?topic=5100378.0I think there is also a gold backed project in the WAVES platform, I just can't remember the name of the project. If by real asset includes real properties then I guess there are more of the projects, you just have to search for it.