RSK is an open source smart contract platform that is secured by the Bitcoin network. RSK is designed to add value and increase the functionality of the Bitcoin ecosystem by providing smart contracts that are compatible with the network's code and can be written in Solidity. RSK smart contracts are powered by the SmartBitcoin (RBTC) which is linked to Bitcoin. (1 RBTC=1 BTC)
RSK developed the RIF Token which is intended to enable users to access a range of DApps within their ecosystem. In September 2019, RSK purchased the Spanish social media platform Taringa with the goal of using the RIF token as an incentive to encourage users to share content.

BitNew Chain is building a development platform for commercial DApps. BitNew Chain aims to make it easier to develop large scale DApps that can be used with hardware. It will be based on a two-tier decentralized blockchain network with standard physical masternodes, resource segregation, a decentralized computing subsystem（BTN-DC）, and decentralized storage subsystem（BTN-FS). Consensus will be achieved through a hybrid mining process that will combine Proof-of-Stake (PoS) with Proof of Masternode. The network is powered by the BTN coin.

Ignis is a blockchain platform that is being developed by Jeluirda; the company behind Ardor and Nxt. Ignis is a child chain of the Nxt blockchain. Jelurida is developing blockchain platforms that will enable users to develop decentralized applications, and will be based on a parent and child chain architecture.
Ignis allows users to create child chains with specific features and to create tokens that meet their needs. This project is closely related to Ardor and Nxt.