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Bitcoin Gold (BTG) is a Bitcoin hard fork that took place in 2017. The initial goal behind creation of Bitcoin Gold was to increase level of decentralization of Bitcoin network as it became obvious that most of the network is controlled by few mining pools.
PayPie (PPP) token is available on a few exchanges paired against Ethereum (ETH). It is currently based on the cryptocurrency Ethereum protocol.
Achain is the Chinese blockchain project based on the modified DPoS protocol (RDPoS). It was launched in the early age of crypto, in 2014.