Yea there's a bunch! - Lens Protocol [https://lens.xyz/ https://lens.xyz/ (one example implementation: https://lenster.xyz/ https://lenster.xyz/)] is an early

Yea there's a bunch! - Lens Protocol [https://lens.xyz/ https://lens.xyz/ (one example implementation: https://lenster.xyz/ https://lenster.xyz/)] is an early social network built on top of Polygon. - Farcaster [https://farcaster.xyz/ https://farcaster.xyz/] is another one, that takes a more hybrid approach of using Ethereum for trustless identity, but stores social stuff in a "sufficiently decentralized" way. - ENS [https://ens.domains/ https://ens.domains/] is a universal username system. - Unlock Protocol [https://unlock-protocol.com/ https://unlock-protocol.com/] uses NFTs for tradeable subscriptions, event tickets, etc. - Radicle [https://radicle.xyz/ https://radicle.xyz/] is a decentralized Github basically, that (optionally) uses Ethereum to store the Git HEAD of a "project" essentially. - Arweave [https://www.arweave.org/ https://www.arweave.org/] stores files permanently using a cool "endowment" mechanism. Currently, the network has secured its storage for like 1000 years in theory. There's a whole ecosystem of apps that use smart contract chains as a trustless/decentralized/distributed compute and storage layer, and use "cryptoeconomics" to incentivize user behavior toward a goal that isn't money-based. It's just far less mature (and noisy) as all the finance stuff, so anyone not actively building in the space isn't seeing most of it today!