Project Showcase
In total, OpenSats has allocated $... USD to free and open-source projects and sent ~... sats to ... grantees in 40+ countries.
Bitcoin Core & Consensus
The full node, validation, and the protocol underneath.
Bitcoin Core
by Bitcoin Core Developers · via the General FundThe full node software that validates the chain, relays transactions, and enforces Bitcoin’s rules.
Floresta
by Davidson Souza · via the General FundAn embeddable Bitcoin client in Rust that validates every block using Utreexo.
Stratum V2
by StratumV2 · via the General FundAn open mining protocol that gives individual miners more control over block construction.
Splicing
by Dusty Daemon · via the General FundResize Lightning channels without closing them.
Validating Lightning Signer
by devrandom and contributors · via the General FundA hardware-friendly Lightning signing stack that keeps private keys off the Lightning node itself.
Bitcoin Dev Kit
by BDK Foundation · via the General FundA modern, descriptor-based wallet library written in Rust.
Wallets
Self-custody software people actually use.
Cove
by Praveen Perera · via the General FundA Bitcoin-only mobile wallet built on BDK with strong hardware wallet support.
Blixt Wallet
by Hampus Sjöberg · via the General FundA non-custodial Lightning wallet that runs a full LND node on your phone.
Blitz Wallet
by Blake Kaufman · via the General FundA self-custodial Bitcoin wallet on Spark, with easy onboarding from custodial to self-custody.
Minibits
by Misovan · via the General FundA mobile Cashu wallet for Android and iOS, with Lightning, nostr, and offline token transfers.
Lightning & Payments
Payments, point-of-sale, and ecash on top of Lightning.
BTCPay Server
by BTCPay Server Foundation · via the General FundA self-hosted, open-source Bitcoin payment processor with no fees and no third parties.
LNbits
by LNbits Contributors · via the General FundA modular Lightning wallet account system with a plugin framework, used as the payments layer for shops, kiosks, hardware projects, and online services.
Cashu Dev Kit
by thesimplekid · via the General FundA modular Rust toolkit for building Cashu wallets and mints.
Cashu
by Cashu Contributors · via the General FundA Chaumian ecash protocol built for Bitcoin that brings near-perfect privacy to custodial payments.
OpenCash
by OpenCash Association · via the General FundA Swiss nonprofit funding the development of open-source ecash systems built on Bitcoin.
Nostr Clients
How people read and post on nostr today.
Damus
by William Casarin · via the Nostr FundA nostr client for iOS with Lightning zaps, relay transparency, and web-of-trust filtering.
Amethyst
by Vitor Pamplona · via the Nostr FundA privacy-focused nostr client for Android with built-in Tor support.
0xchat
by water783 · via the Nostr FundA secure nostr chat client for iOS, Android, and desktop with encrypted DMs, groups, calls, and payments.
Coracle
by Hodlbod · via the Nostr FundA web-based nostr client focused on relay management and web of trust.
Flotilla
by Hodlbod · via the Nostr FundA Discord-like nostr client built around the idea of "relays as groups," with chat, threads, events, voice rooms, and white-labeled instances.
Soapbox
by Alex Gleason · via the Nostr FundOpen-source software making nostr the best place to build and create on the social web.
Nostr Infrastructure
Relays, libraries, signers, and developer tooling.
NDK
by PabloF7z · via the Nostr FundA modular TypeScript toolkit for building nostr applications, with first-class outbox-model support and reactive UI bindings for Svelte and React.
Applesauce
by hzrd149 · via the Nostr FundA modular TypeScript SDK for building nostr web clients, extracted from noStrudel.
Citrine
by Greenart7c3 · via the Nostr FundA nostr relay that runs on your Android phone, used as a local cache and a private write target by other clients on the same device.
Frostr
by Austin Kelsay and cmdruid · via the Nostr FundA FROST-based threshold signing protocol for nostr with libraries and clients for multi-device keys.
Amber
by Greenart7c3 · via the Nostr FundA nostr signer for Android that keeps the nsec in one app and signs events for every other client over NIP-46.
ngit
by DanConwayDev · via the Nostr FundA git plugin and remote helper that puts repository state, pull requests, and issues on nostr, with normal git servers used as the data store.
Zapstore
by Franzap · via the Nostr FundA nostr-based app store for signed releases, open discovery, and censorship-resistant software distribution.
Privacy & Infrastructure
The plumbing that keeps the rest of the stack honest.
The Tor Project
by The Tor Project · via the General FundFree software and open networks for online privacy, anonymity, and censorship resistance.
GrapheneOS
by GrapheneOS Foundation · via the General FundA hardened mobile operating system focused on privacy, security, and Android app compatibility.
Payjoin Dev Kit
by Dan Gould · via the General FundThe Rust library for Payjoin, with bindings for Python, Dart, Swift, Kotlin, JavaScript, and C#.
Education & Research
People bringing in the next wave of contributors.
Summer of Bitcoin
by Adi Shankara · via the General FundA global internship program for student Bitcoin contributors.
Satoshi Nakamoto Institute
by Michael Goldstein · via the General FundA nonprofit archive and publishing project dedicated to preserving Bitcoin history and ideas.
Bitcoin Design Community
by Christoph Ono · via the General FundDesign resources for teams building better Bitcoin products.