Elastos (ELA) is a mineable coin currently represented on a few Asian exchanges. Blockchain solutions of the issuing company can be applied across various industries, such as real estate, media, etc.
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.
Ignis is the cryptocurrency token developed by the renowned Ardor blockchain. Cryptocurrency pairs including Ignis are listed on the number of exchanges. There is a native exchange Ardor service, where you can buy this asset (as well as NXT and Ardor coins) for fiat and other cryptos.