Emercoin (EMC) is the mineable coin based on the Emercoin’s own blockchain. You can convert these coins to other cryptos and back on a few exchanges. Emercoin was launched as early as in 2013 as the Peercoin’s fork.
Ubiq (UBQ) is the mineable coin supported by the number of exchanges. Running the “Ethereum Virtual machine”, Ubiq provides developers with the tools to create smart contracts.