Bitcoin Gold (BTG) is an open-source hard fork of the Bitcoin cryptocurrency. The fork occurred on October 24, 2017, at block height 491407. The stated goal of the fork is to make mining decentralized again by allowing the Bitcoin Gold cryptocurrency to be mined using graphics cards instead of specialized ASICs, the price of which can reach several thousand dollars.

The NANO cryptocurrency (NANO) is a platform for fast payments that requires a minimal amount of resources, which makes Nano an ideal means for conducting peer-to-peer transactions. The NANO cryptocurrency was originally launched in 2015 by Colin LeMahieu under the name RaiBlocks.

The ICON cryptocurrency (ICX) is an interchain blockchain that connects the different blockchains of other cryptocurrencies, such as Bitcoin, Ethereum, and Qtum.

Populous (PPT) is a peer-to-peer (P2P) network platform that uses blockchain to provide small and medium-sized enterprises (SMEs) with a more efficient way to make payments. Populous allows companies to sell their invoices at a discount for quick access to cash and significant savings on transaction fees, which as of 2018 amount to up to 2 billion dollars per year in the United Kingdom.