Nebulas (NAS) coin is based on its own blockchain and functions as the native utility token of the Nebulas system. This cryptocurrency is featured by the number of exchanges.
Pundi X (NPXS) is the utility token of the eponymous platform and based on the Ethereum protocol. The cryptocurrency pairs including NPXS are listed on multiple exchanges.
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.