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.
iExec RLC (RLC) is an ERC-20 compliant digital asset and used as a payment method for using the iExec network’s resources. RLC abbreviation stands for “runs on lots of computers”. A fair number of exchanges features RLS in its cryptocurrency pairs.
Time New Bank (TNB) is an ERC-20 token that is currently undergoing a gradual swap to its own mainnet. This is the settlement token for transmitting assets based on value of time. At the time of writing, you can trade an Ethereum-based TNB token against USD on the Bitfinex exchange.