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.
Elastos (ELA) is a mineable coin currently represented on a few Asian exchanges. Blockchain solutions of the issuing company can be applied across various industries, such as real estate, media, etc.
A social network digital coin, the ReddCoin (RDD) had forked from Litecoin as far back as in 2014. It is currently listed by a few exchanges with the possibility to buy the coin for fiat currencies. The ReddCoin blockchain “uses personalized IDs for social media tipping”.