NIP-61: Nutzaps fix nostr tipping. Instead of trusting a middleman to verify zaps, the Cashu token itself is the receipt. Sender P2PK-locks ecash to recipient's key, publishes proofs on nostr, recipient redeems directly. Verifiable, self-custodial, no intermediaries. #SovEng https://nips.nostr.com/61

NIP-60: Self-custodial Cashu wallets that live on nostr. Encrypted proofs follow you across apps, no accounts needed. Just your keys, your money, your relays. Built at SEC-02. #SovEng https://nips.nostr.com/60

Kartapio: A decentralized food delivery marketplace built on Nostr. Order food without intermediaries taking cuts or storing your data. Direct peer-to-peer commerce between restaurants and customers. #SovEng https://github.com/vstabile/kartapio

Your website shouldn't depend on someone else's server, someone else's terms of service, or someone else's permission. nsite fixes this. It's a website hosted entirely on Nostr relays and Blossom servers. Your npub is your domain. Your keys are your credentials. No hosting provider can rugpull you because there is no hosting provider. The raw data lives on Blossom, the file mapping lives on relays, and anyone can spin up a gateway to serve it. Redundant at every layer. nsite came out of in Madeira, where builders turn freedom tech ideas into working code. https://nsite.run

cypher.space: Platform for building sovereign Bitcoin-only businesses. Enables permissionless commerce with privacy-first collaboration tools. Separation of organizations and state. #SovEng https://cypher.space/

NIP-54: Wiki / Wikifreedia: Decentralized encyclopedia on nostr where multiple perspectives coexist instead of a single canonical truth. Anyone can write articles on the same topic, readers choose which version to trust through their social graph. Uses Djot markup and wikilinks. #SovEng https://wikifreedia.xyz/

Wasm DVM: WebAssembly-based Data Vending Machine for executing wasm plugins over Nostr. Pay-per-execution, encrypted I/O, scheduled execution, and DLC-based execution using extism runtime. Pluggable compute on decentralized infrastructure. #SovEng https://github.com/benthecarman/wasm-dvm/

on StartOS: Remote nostr signer packaged for StartOS - keep your nsec safe on your own infrastructure while signing from any client. Self-sovereign key management without trusting third parties. #SovEng https://github.com/hzrd149/-startos

npub.cash: Lightning addresses for everyone on Nostr. No sign-up, no KYC — just use your npub as your Lightning address. Built with Cashu eCash for privacy-preserving payments. Your keys, your address. #SovEng https://npub.cash/

Note Duel: Bet nostr notes on outcomes using DLCs. Choose a Superposition oracle event, write winning/losing notes. Smart contracts enforce which note publishes from your profile. Cryptographic enforcement, zero shitcoins. #SovEng https://blog.mutinywallet.com/note-duel-superposition/#note-duel

Zapstore: Permissionless app store powered by nostr and your social graph. No gatekeepers, no censorship — publish directly to users, discover apps through communities you trust. Your device, your rules. #SovEng https://zapstore.dev/