Dropil (DROP) is an Ethereum token and works as a utility token for the Dropil platform. No more Dropil tokens will ever be created, which is supposed to prevent further deflation. You can buy Dropil (DROP) for cryptos (for example, BTC or ETH) with some exchange platforms.
Ethereum Classic appeared after Ethereum hard fork in 2016. Just like Ethereum, the platform is capable of hosting smart contracts and serves as a virtual computing machine. The native token of Ethereum Classic is ether (ETC).
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.