The EOSIO ecosystem is composed of many public and private blockchains, each one with different governance models and aimed at different use cases and markets.
Below we included a list of some other well known public blockchains launched on EOSIO, we did not include any EOSIO private networks.
EOS : the first blockchain launched with the EOSIO protocol, also know as "mainnet".
BOSCore: a high-speed blockchain and low finality for business and enterprises looking to implement parallel computing and IBC.
Eosfinex: a blockchain that promotes the cryptocurrency exchange in an auditable and public way.
Europechain: a public-permissioned blockchain that uses conventionals channels to support the enforcement of the European normative, GDPR included.
Liberland: (pending launch) a democratic blockchain that promotes Liberal Republic citizens.
Lynxx chain: a blockchain that simplifies user experience by removing the need for users to worry about network resources.
Telos: a blockchain platform without high-performance permissions for decentralized applications with advanced data storage and governance functions.
Ultra: a blockchain geared towards the gaming industry.
Voice: a blockchain to promote a decentralized social network built by Block.one.
WAX: a blockchain token and protocol specially designed to make e-commerce transactions faster, easier and more secure.
Worbli: a blockchain designed for the normative compliance with the financial sector, KYC verified accounts included.
You can see a complete description of several EOSIO public blockchains here ineos.io