NEM

NEM is a blockchain platform that made its debut in March 2015. As one of the early players in the crypto scene, it aimed to address the shortcomings found in other blockchains at that time. It was among the first non-Turing complete chains to introduce features such as user-defined tokens known as mosaics, namespaces, multisignature accounts, and a peer-to-peer reputation system based on EigenTrust++. Its most significant innovation is the proof-of-importance consensus mechanism, designed to incentivize on-chain activity while discouraging the wealth concentration typically associated with proof-of-stake systems. The platform's client, NIS, is developed using Java.

NEM boasts a worldwide community and serves primarily as an alternative payment method for businesses and vendors. It has been particularly popular in Japan, where various social media applications, like nemgraph—a community-managed counterpart to Instagram—are built on it.

In December 2021, NEM underwent a hard fork orchestrated by a pseudonymous group of cryptocurrency experts and enthusiasts. Known as Harlock, this update was a clear indication of the community's ambition to transform NEM from a mere echo of its past into a leading global platform for on-chain and off-chain media content payments.