Decentralized Systems

Bitcoin - Services and tools for Bitcoin software developers.
Ripple - Open source distributed settlement network.
Non-Financial Blockchain - Applications of Blockchain beyond finance.
Mastodon - Open source decentralized microblogging network.
Ethereum - Distributed computing platform for smart contract development.
Blockchain AI - AI and machine-learning projects built on Blockchain.
EOSIO - A decentralized operating system supporting industrial-scale apps.
Corda - Open source Blockchain platform designed for business.
Waves - Open source Blockchain platform and development toolset for Web 3.0 apps and decentralized solutions.
Substrate - Framework for writing scalable, upgradeable blockchains in Rust.
Golem - Open source peer-to-peer marketplace for computing resources.
Stacks - A smart contract platform secured by Bitcoin.
Algorand - An open-source, proof of stake Blockchain and smart contract computing platform.
ZeroNet - A decentralized web-like network of peer-to-peer users.
Cosmos SDK - Modular framework for building app-specific blockchains in Go.
Tor - A free overlay network for enabling anonymous communication.
ATProto - Open, decentralized network for building social apps.