Avalanche provides developers with a platform to build and launch scalable Web3 dApps and Subnets.
Bitcoin Core is an open source project which maintains and releases Bitcoin client software assisting in blockchain validation.
Polygon allows developers to build user friendly, scalable Web3 dApps with low transaction fees on top of the Ethereum blockchain.
Solana is a decentralised blockchain where developers can build scalable apps and users can help manage validation to assist in running the Solana network.