NXT is described as 'Nxt is a fast and energy-efficient cryptocurrency based on the Proof-of-Stake concept, suitable for online payments and decentralized assets. Nextcoin and Nxtcoin are features of Nxt' and is a cryptocurrency coin in the bitcoin & cryptocurrency category. There are more than 50 alternatives to NXT for a variety of platforms, including Windows, Linux, Web-based, Mac and Android apps. The best NXT alternative is Bitcoin, which is both free and Open Source. Other great apps like NXT are Monero, Ethereum, Litecoin and DASH.