Blocknet is a good, which has been running since 2014. I believe this one could pull a 100x easily next bull run, since they was the first to make a real DEX, and what most people don't realize is, it's the only real DEX on the market to this date. All the other "DEX's" you see competing, isn't truly decentralized, sadly.
Blocknet also solves the oracle problem, which means they can connect blockchain, and real world data together. You can see the results for youself if you join their Discord server. You can pull a ton of info from their Xrouter. Pretty damn cool  

This was just one project though, do your own research...