Tezos is a smart contract platform with its own blockchain and a native token (Tezos, XTZ). The governance is performed via Proof-of-Stake algorithm. It means that stakeholders (those who own at least 10,000 XTZ) vote for changes in the protocol. These validators ("bakers") get rewards for the performance of validation. The rewards are generated via inflation. Those who delegate their XTZ to bakers can earn, too.
Tezos has a built-in "self-amendment" mechanism which makes it possible to shape the network without having to make forks. It keeps the community united and makes development process easier.
Santiment Network Token (SAN) is an ERC-20 utility token of the Santimet market research network. The token is listed on a few exchanges with the possibility to trade it against USD.
DigiByte (DGB) is an open-source cryptocurrency launched in 2014. As of now, the coin is close to the bottom of the top 50 cryptocurrencies by market cap. DigiByte relies on the Proof-of-Work consensus mechanism hence it can be mined. The currency is deflationary and built using the Bitcoin code but unlike Bitcoin, its total supply is limited to 21 billion DGB. Another priority of DigiByte currency is the speed of transactions. Currently, the network is capable of performing over one thousand transactions per second.