One that I hardly see mentioned here at all is XSN.
I know it's a low cap coin, but the upside potential on this one is
massive sitting at around $0.10 right now, with an all time high of $0.78, so it really never pumped all that much, which is a good sign.
Things worth noticing: First POS/Masternode coin to implement Segwit, Lightning Transactions, and Atomic Swaps on Mainnet.
Third project worldwide to implement Lightning next to BTC, and LTC, The devs behind the project actually formed a partnership with LTC - helping them with Lightning integration.
Inventor of Cold Staking (TPOS- Trustless Proof Of Stake).
Masternode As A Service, Paid with in XSN - Making it easy for anyone to setup a masternode in minutes.
Masternode Monitoring Service, which emails you if your masternode goes down.
Pooled staking service.
Their Multi Currency Lightning Wallet with 1-click lightning transactions is currently in beta testing, and is soon ready as a mobile app as well. Check the preview below:
Their
Lightning DEX is the true game changer, and mostly the reason why I'm so bullish on this project. It will run on masternodes, which will host all the blockchains in the network.
This means:
No sync time
No registration
No KYC
Easy, FAST, trading, as you know it from a centralized exchange, but with 100% security, with no dangers of exchange hacks etc.
Do your own research on this one
Check out the Stakenet "Light" paper which explains everything as short as possible.
https://medium.com/stakenet/stakenet-light-paper-56552f8c07a2