Decentraland (MANA) is currently based on cryptocurrency Ethereum protocol. You can trade this digital asset on the fair number of exchanges. For example, Binance features MANA/BTC currency pair.
Po.et (POE) is the Ethereum token used by the Po.et network to incentivize content creation. This digital asset is paired against other cryptos (such as BTC and ETH) on a few 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.