prcdice.eu
+ Investing program

rollin.io
+ Cool and unique design

fortunejack.com
+ Integrated with Casino, Lottery, Poker, and Binary trade

pocketdice.io
+ Awesome animation, mobile friendly

My favorite is FortuneJack, their dark interface is awesome and work smoothly. Too bad they don't have chat and investing features.
Anyway, if you feel bored with dice, the site on my signature offers more suspense on betting. Check it out!