Comet (CMT) cryptocurrency is formally accounted on the number of ratings.. However, there is no up-to-date official information about its current status. Therefore, we can conclude that the coin is currently inactive.
Cosmos is a network which connects different distributed ledgers. It means that Cosmos helps to process interblockchain operations. Consensus algorithm used by Cosmos is Proof-of-Stake. Currently, the validators of the Cosmos ecosystem are forming an Inter-Blockchain Communication (IBC) protocol. The native token of the Cosmos system is ATOM.
Ripio Credit Network (RCN) is the ERC20 utility token of the eponymous credit network. It is a cost-effective tool that allows to process a cost-free transaction within the ecosystem. The token is trading on the number of exchanges paired with other cryptos.