IOST (Internet of Services Token) is a blockchain platform that is focused on improving transaction speed and scalability. IOST has a unique Proof of Believability consensus mechanism that is based on past contributions and behavior.
The company claims that their platform will increase security and efficiency compared to other platforms. IOST uses a sharding technique that splits the network into smaller ones and randomly assigns tasks for the nodes on the network.

XMax is creating a developer ecosystem for entertainment DApps. Their entertainment-focused blockchain ecosystem will enable multiple functional sidechains, and will provide a SDK which will make it easier to develop decentralized applications. XMax will also offer a variety of multimedia libraries. The XMax blockchain will have a VRF (Verifiable Random Function) consensus mechanism that will randomly select network users to participate in the verifying transactions.

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.