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”.
Power Ledger (POWR) is an ERC-20 compliant market token of the energy platform, that is listed by a number of exchanges. It can also be traded against the fiat currency on some of these platforms: for example, against USD on the LocalTrade exchange.
Horizen (ZEN) is the native cryptocurrency of Horizen blockchain. It can be mined. Much alike Zcash, ZEN offers regular and shielded addresses. A number of exchanges feature ZEN, including USD as a pairing choice on Bittrex.