The Dentacoin (DCN) token represents an extended version of an ERC-20 contract. The token is available with several exchange platforms. At the moment of writing, you can trade DCN against two fiat currencies (EUR and USD) with Folgory 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.
Cube (CUBEAUTO) is the ERC-20 token of the AI network security company utilizing blockchain technology. The token is currently listed with few exchanges.