SHIFT is probably one of those hidden gems. Viable product already in testnet, while they spect to launch the final product in december. The first IPFS Decentralized website hosting + data storage, they already came out with a solution for dynamic DNS for IPFS, and they just have a 10 million marketcap . They will reach almost 100% sure 100 million marketcap in the next alt rally, easy 10x, and if the market get a bit crazy they could reach 1k million market cap, 100x. 
Shift is one of those projects that is going to be very successful in the future, I have no doubts that shift is going to have a market cap of at least 1 billion dollars in the next 5 to 10 years, after all what can be more revolutionary than a decentralized internet.