"nostr" stands for "Notes and Other Stuff Transmitted by Relays" and is an open protocol for censorship-resistant global networks created by @fiatjaf.

Protocol

• NIPs - the "Nostr Implementation Possibilities" describe the protocol in technical detail
• nostr address book - A directory of twitter users accounts and their NOSTR addresses
• nostr, a basic tour - an intro to nostr
• Nostr: Solucionando la censura de una vez por todas
• nostr.guide - A guide to all things nostr
• nostr.how - Quick-start to onboard desktop users with Alby & Astral
• nostr - overview and FAQ
• tinkering with nostr without any client
• UseNostr - A small guide for anyone who wants to learn more about how nostr works and what it can do.

Relays

Relays are (so far) application agnostic. You can run your own or use any or all of the public instances.

Implementations

• Astro– Elixir based implementation built to be performant and highly distributed.
• Denostr - Deno based, cloud native nostr implemention support by ByteTrade and Revo.
• Ephemerelay - An in-memory Nostr relay that doesn't store data.
• expensive relay- a relay that requires payment for registration
• gnost-relay - nostr relay written in go backed by postgresql database.
• knostr – a nostr relay implemented in Kotlin with support for Postgres and metrics(micrometer).
• me.untethr.nostr-relay - a relay written in Clojure
• Minds Nostr Relay - a relay for Minds, an open-source social network
  • Minds Engine - Nostr - relevant Minds API code for reading/writing Minds posts using Nostr
• monstr- python code for working with nostr
• Nex - A powerful and scalable Nostr relay written in Elixir with Postgres DB.
• NNostr - a C# relay
• nodestr - a Node.js implementation
• nostr_relay – a nostr relay written in python, backed by SQLite
• nostr-relay-nestjs - A Nostr relay implemented using the NestJS framework
• nostr-rs-relay - a minimalistic relay written in Rust that saves data on SQLite
• nostream - a nostr relay written in Typescript backed by PostgreSQL (renamed from nostr-ts-relay)
• nostring - A Nostr relay written in Deno.
• NostrPostr Relay - a Kotlin Relay supporting both SQLite and Postgresql
• nostrpy - relay, client, and other tooling in python (No longer being developed.)
• PyRelay – a python implementation of a nostr relay, using asyncio.
• Relayer Basic - a simple relay based on relayer backed by Postgres
• Servus - A self-contained, single executable, CMS / blogging engine reminiscent of Jekyll which also acts as a personal Nostr relay for your blog posts. Written in Rust.
• søstr – a private nostr relay written in rust, saves all notes from one pubkey and publish them to anyone that requests them
• sovereign-stack - a tool that helps you deploy nostr relays and create self-hosted (bitcoin-only) Value4Value websites.
• strfry – C++ implementation backed by LMDB with efficient syncing of events using merkle trees

Instances

Instances are plenty and their availability may vary but these projects track them:

• nostr relay registry - real-time checking of status of some known relays
• nostr.info - real-time checking of status of some known relays
• nostr.watch - real-time checking of status of some known relays

Clients

• algia-web - A small resource consumption oriented Nostr web client.
• algia - A cli application for nostr.
• Amethyst - An Android client for nostr written in Kotlin
• ArcadeCity - Public group chats and P2P services (WIP) over nostr
• Astral - a branle fork with global feed and UI makeover
  • Astral on TOR
  • astral.ninja
  • client.nostr.guide
• Attached - Open-Source ReactNative Expo app for Nostr (iOS, Android). Currently under app stores review.
• Bija - A desktop client written in python. Currently Linux only
• Blockcore Notes - Progressive Web App that can be installed on mobile and desktop, organize following in circles and have both public and private following lists. Dynamic interface for different uses, such as optimized for photograph viewing.
  • notes.blockcore.net
• blogstack.io - Blogging site for nostr, supports markdown
• Blowater - A desktop Web client focusing on chat with delightful UX.
• bolt.fun - A bitcoin lightning makers community that supports reading and creating comments using Nostr
• coracle - A nostr web client
• Daisy - Mobile client for Android and iOS
  • testflight + android builds
• damus - a twitter-like nostr client for iOS and MacOS
  • damus on testflight
• Disgus - A comment widget like Disqus, but for Nostr.
• dispute - A cross-platform (Linux, Android, iOS, MacOs, Windows and Web) client for NOSTR
• electron-nostr - A bare-bones desktop nostr client using electron-react-boilerplate. Goal is to be an easy template for people to experiment with different ideas on decentralized ratings, reputation, and web of trust
• emon - Encrypted DMs over nostr with lightning payments integrated (WIP).
  • emon.chat
• Flycat - A 2000s old-school style web client which support blogging on Nostr
• futr - nostr client desktop app written in Haskell
• gnost-deflate-client CLI nostr client written in go implementing permessage-deflate websocket compression.
• gossip - A desktop client in rust presented with egui
• Hamstr - A twitter-style web client built with Vue.js
  • hamstr.to
• iris - A nostr web client
  • iris.to - live instance
• Android app
• Jester - Chess over nostr
  • Jester instance
• Lightning.Pub - A nostr daemon for Lightning nodes
• Listr - A Nostr Web Client for Making Lists, built with Next.js 13 and TypeScript.
  • Listr-demo.vercel.app - Live instance.
• loquaz - a desktop app written in Rust for direct encrypted chat
• Member - Progressive Web App Client. Works on desktop and mobile.
  • member.cash - live instance
• MeShell - Web, iOS and Android blog type client destined to publish articles and researches for independent journalists.
  • MeShell.io - Landing page for more information
• Minds - open source social network. Supports reading and creating posts using the Nostr protocol
• more-speech - desktop client for nostr written in Clojure
• nblog - a self-host nostr ghost blog
• Nos - A UX focused iOS / MacOS app written in swift based on planetary.social
  • nos.social
• nosbin - pastebin over nostr
• noscl - a basic command-line client written in Go
• Nosky - A native Android client for Nostr. Still in development
• NostrChat.io - NostrChat is a chat app where you can have group chats, DM, threads, and emojis.
• nostr console - a nostr command line client written in Dart. Binaries available for Windows, Linux, and MacOS
• Nostr Nests - Nostr Nests is an audio space for chatting, brainstorming, debating, jamming, micro-conferences and more.
• nostr-chat-widget-react - A React component that provides a live-chat widget over nostr that can be embedded into any website.
• nostr-java - A nostr client API written in java, for generating, signing and publishing events to relays
• NostrEmitter - Simple E2E encrypted client and EventEmitter object
• Nostribe.com - Nostr client web app built with Next.js 13 and TypeScript.
  • Nostribe.com - Live instance.
• Nostrid - Multi-platform client currently offering binaries for Android, Windows, MacOS and Linux.
  • Nostrid.Web - Web version running completely on the browser. It can be installed locally as PWA.
• Nostrify.me - Nostr client built in SvelteKit.
  • Nostrify.me - Live instance.
• nostromat - A Twitter-style Nostr web client, written in Clojurescript/React
  • nostrom.at - live instance
• Nostros - A nostr mobile client for Android
• Nostrtium - Post to Nostr directly from within WordPress
• nostrweb - another nostr web client in vanilla JS
  • nostr.ch - live instance
• notebin.org - Nostr UI created with NextJS, support for markdown and code highlighting
• Noteon - Yet another nostr client focused on private chat and group chat with a simple, elegant and secure interface.
  • nostr.noteon.io
• Nozzle - A Twitter-like native Android client written with Jetpack Compose
• ourChan.org Anonymous imageboard on nostr, from a fork of 4Chan.org
• Pretty Good Apps - A desktop nostr client for linux, mac and windows with a focus on decentralized reputation and web of trust. First application: crowdsourced decentralized list curation.
• Satellite - Nostr web client with Reddit-style threads
  • satellite.earth - live instance
• scalastr - A barebones nostr client written in scala
• second exchange - an experiment to work out something of like medium, something of creator economy where users are rewarded for engaging in quality discussion and most importantly engaging in governance-related discussion
• Sendstr - shared clipboard between devices over nostr
• shockwallet - A Lightning wallet that uses nostr and lnurl to connect to nodes
• Snort - Nostr UI written in react
  • snort.social
• Stackerstan - A decentralised organisation built on Bitcoin and Nostr, implemented as a replicated state machine in Golang
• Tamga - An offline first nostr contact & profile manager for iOS!
• uBlog - A minimalist blog on nostr that allows anyone to easily create their own personal micro-blog.
  • u-blog.vercel.app
• Votestr - Poll web app with nostr authentication and blind signature unlinkability
• Written Self hosted blog using nostr long-form content (NIP-23) and it shows only posts by selected authors.
  • Demo
• yakihonne.com - A censorship-resistant and data ownership free protocol concerning dmedia.

Client reviews and/or comparisons

• Feature comparison list of Nostr clients

Libraries

• arduino-nostr(https://img.shields.io/github/stars/lnbits/arduino-nostr.svg?style=social) - An Arduino nostr library.
• dart_nostr - A developer experience Dart library for Nostr
• dart-nostr - a Dart library for Flutter
• go-nostr - a Go library that implements relay management, plus event encoding and signing utils
• NNostr.Client - a C# Nostr library for use by clients
• nostr_rust - Functional Rust implementation of the nostr protocol
• nostr-bot - a Rust library for writing bots
• nostr-connect - Nostr Connect SDK for TypeScript is a library that allows you to easily integrate Nostr Connect into your web application
• nostr-deno - a client library for Deno javascript runtime.
• nostr-js - a javascript implementation of the nostr protocol
• nostr-hooks - React hooks for developing Nostr clients. It's simple and intelligent.
• nostr-php - a PHP library for nostr
• nostr-react - React Hooks for Nostr
• nostr-relay-inspector - A library that returns useful information about relays based on nostr-js
• nostr-relaypool-ts - a TypeScript relay pool library on top of nostr-tools that simplifies handling subscriptions to multiple servers
• nostr-rs - a Rust implementation of the nostr protocol
• nostr-ruby - a Ruby implementation of the nostr protocol
• nostr-tools - a JavaScript client that abstracts the relay management code for use by clients
• nostr-types - a rust library defining types useful for the nostr protocol
• nostr:
  • nostr: Rust implementation of Nostr protocol.
  • nostr-sdk: High level client library.
  • bindings: UniFFI (Kotlin, Swift, Python, Ruby) bindings
• nostr - a Ruby Nostr gem for use by clients
• NostrKit - a Swift library for interacting with relays
• NostrPostr - a Kotlin Nostr library for clients or relays
• pynostr - a python library for nostr
• python-nostr - a python library for making clients
• relayer - a server framework for writing custom relays
• schorr_snap - A snap plugin for Metamask Flask, supports nostr

Bridges and Gateways

• matrix-nostr-bridge a simple Matrix-to-Nostr or Nostr-to-Matrix bridge
• Mostr - a bridge between Nostr and the Fediverse (Mastodon, ActivityPub, etc.)
• rsslay - fork of the rsslay by @fiatjaf. a bridge that puts RSS feeds into Nostr optimized, more funcionalities and UI improvements. Live at rsslay.nostr.moe
• smtp nostr gateway - a bridge that forwards emails to pubkeys as encrypted direct messages

Sure, here's the list sorted alphabetically while maintaining the markdown syntax:

matrix-nostr-bridgestars - a simple Matrix-to-Nostr or Nostr-to-Matrix bridge Mostrstars - a bridge between Nostr and the Fediverse (Mastodon, ActivityPub, etc.) rsslaystars - fork of the rsslay by @fiatjaf. a bridge that puts RSS feeds into Nostr optimized, more funcionalities and UI improvements. Live at rsslay.nostr.moe smtp nostr gateway stars - a bridge that forwards emails to pubkeys as encrypted direct messages

Tools

• anonroom - anonymous chat room inside nostr
• blastr - A nostr cloudflare workers proxy relay that publishes to all known relays.
• blogsync - Self-host blog articles from long-form notes e.g. via Caddy server.
• git-nostr-tools - A cli tool for sending code patches over nostr
• git-nostr - A tool to enhance git cli with nostr communications. Publish patch content, prs, repo name, issues, etc to nostr relay.
• heyxynip5 - A CLI helper for converting nostr npub/nsec to their hex format for NIP-05 verification.
• homebrew-nostr - Homebrew tap for Nostr software.
• http-nostr-publisher - A Cloudflare worker to publish Nostr events to relays through a non-blocking HTTP interface .
• joinstr - coinjoin implementation using nostr
• keystr-rs - An application for managing Nostr keys. Written in Rust, with simple UI (Iced).
• lnpass - A key manager for Lightning and nostr.
• nashboard - a Nostr network dashboard with network statistics, reachable here
• ndxstr - nostr's layer 2 indexing nodes, with more advanced querying capability than currently supported by relays
• nip06-cli - a Node.js CLI to generate or restore NIP-06 seed phrases
• nip06-web - a website to generate or restore NIP-06 seed phrases
  • nip06.jaonoct.us - by jaonoctus
• nkcli - A CLI tool for nostr key manage and serve NIP-46.
• nos2x - nostr signer extension - a browser extension for signing events on 3rd party site without sharing your private keys with them
• nostcat - cat-like nostr client for scripting and debugging written in Rust
• nostr army knife - nostr army knife by fiatjaf
• nostr GitHub Action - send events from GitHub Actions
• nostr registry - a database of known relays with their uptime and NIP support tables
• nostr_simple_publish- Drupal module to publish content to Nostr.
• nostr-broadcast This tool lets you take your events from some relays and broadcast them to another relay. Could be helpful for backing up your notes to a private relay.
• nostr-bulk-dms - A tool that allows you to send DMs over nostr to many recipients in bulk.
• nostr-cln-events - A CLN plugin to push clightning node events to nostr
• nostr-commander - simple but convenient CLI-based Nostr app for following users, sending DMs, etc.
• nostr-follow-bundler This tool lets you create lists of profiles that other users can then see and follow themselves.
• nostr-fzf - Nostr Directory; a tool for searching usernames and channels
• nostr-launch - a tool for launching a bunch of relays and clients locally for development and testing
• nostr-notify - desktop nostr notifications using libnotify
• nostr-proxy - Push and get events to your Proxy, get results from multiple Nostr relays.
• nostr-rs-relay-compose - a Docker compose deployment for nostr-rs-relay with SSL support based on Traefik
• nostr-spam-detection - An experiment in building a machine learning model to label Nostr spam content for filtering and relay rejection.
• nostr-terminal - SSH-like access to your machine via web terminal, powered by Nostr.
• nostr-tool - Rust CLI tool to generate and publish events
• nostr-wtf - A set of nostr tools available and deployed on a web app including a pubkey converter and relay query tool.
• nostr.directory - searchable database of nostr users and their other social media links.
• nostr.guru - a nostr web gateway for viewing events by their ID
• nostr.io - network statistics with last published notes, top 50 publishers, and top 50 followed users
• nostr.rest - Mine proof of work public keys with user specified prefixes
• nostrandom.netlify.app - generate publish-able Nostr event with random keys
• nostrefresh - simple refresh function for nostr web pages
• nostrends - Trending on Nostr, like Twitter trends. Live at nostrends.vercel.app.
• nostreq - Nostr relay event request generator
• NostrFlu - A tool to collect and resend following lists from relays. You can also check badges.
• nostrich.fun - A feature-rich directory of nostr projects. A fork of LightningNetworkStores.com
• nostrify - A Core Lightning plugin that sends events (forwards, connect, disconnect, etc.) to nostr.
• nostril - C cli tool for creating nostr events
• nostrillery - a tool for running performance tests against Nostr relays
• nostrview - A nostr search engine. Search by content, tags, events or pub keys.
• powrelay.xyz - A proof of work based nostr explorer.
• rss.nostr.band - Create custom RSS feeds with posts matching your keywords and consume using your favorite RSS reader.
• sb.nostr.band - Search bots that you can create and follow to receive new posts matching a keyword right into your feed.
• strfry policies - A collection of moderation & antispam policies for the strfry relay developed in TypeScript/Deno.
• tostr - a twitter to nostr bot

NIP-05 identity services

• bitcoiner.chat - A free NIP-05 ID registration service.
• getalby.com - Lightning wallet with NIP-05 ID registration service.
• iris.to — A Nostr client that provides a free NIP-05 ID
• nanostr A NIP-05 name server written in Deno.
• nip05.social - A free and anonymous NIP-05 ID registration service
• nostr-relay.org - A NIP-05 ID registration service
• nostr.industries - A free and open source NIP-05 ID registration service. Run your own.
• nostr.ly/easyNostr - NIP-05 ID provider: Use your own domain, or one of ours: nostr.ly, mynostr.io, easyNostr.com. Free (for now).
• nostrcheck.me - A NIP-05 ID registration service.
• nostrplebs - A NIP-05 ID registration service.
• nostrprotocol.net - A free NIP-05 identifier service.
• plebs.place - A NIP-05 ID registration service (in portuguese).
• pleroma2nip05 - A Python based service to link pleroma ID's to nostr keys.
• younostr.com - A NIP-05 ID registration service (in portuguese).
• onlyzaps.club - A free, open-source and anonymous NIP-05 ID registration service for all

Offline signer

• keechain - Bitcoin application to transform your offline computer in an AirGap Signing Device (aka Hardware Wallet) with support to NIP-06 and NIP-26.
• nostr-signing-device - Signing device for Nostr built on ESP32
• nostrum - Nostrum it's a mobile app that allows you to sign transactions and messages with your Nostr keys. Nostrum is the reference implementation for a remote signer app (ie. Wallet) of the Nostr Connect protocol.

Vanity pubkey mining

• glasnostr - CLI tool to mine a vanity prefix for your nostr npub
• go-pubmine - Multithreading nostr keypair generator which gives pretty (vanity) public keys. Both cli and web app are available.
• key-generator - A simple tool to generate nostr keypair.
• nostr-pubminer - A simple tool to mine nostr vanity pubkeys
• nostr-vanity-address-generator - Cross-platform nostr vanity address generator
• nostrogen - simple web based nostr vanity address generator
• rana - Vanity pubkey miner based on nip13

Browser extensions

Allow you to sign Nostr events on web-apps without having to give them your keys

• Alby - Bitcoin Lightning app with nostr support
• Blockcore - Multi wallet browser extension with nostr support
• Flamingo - Nostr browser extension with a focus on UX
• nos2x - Nostr Signer Extension
• Nostore - Nostr Signer Extension for iOS/macOS Safari
• nostr-keyx - A NIP-07 browser extension that uses the OS's keychain or YubiKey to protect your private keys.
• TokenPocket - Multi wallet browser extension with nostr support. https://tokenpocket.pro
• wen - browser extension for website enhancer with nostr

NIP-57 Zaps compatible wallets and solutions

• Alby - Bitcoin Lightning app with nostr support
• Blink - Blink (ex Bitcoin Beach Wallet)
• btcpayserver - btcpayserver has NIP-57 support for LN addresses since 1.9 version
• Current - nostr client + lightning wallet
• LightningTipBot - A tip bot and Bitcoin Lightning wallet on Telegram
• nostdress - Lightning addresses server based on satdress. Adapted to work with Nostr features (NIP05, NIP57)
• Wallet of Satoshi - Custodial lightning wallet
• Zebedee app - Zebedee's wallet/lightning app
• ZeusLN - A mobile Bitcoin/Lightning app for LND, Core Lightning, and Eclair node operators

Community

Outside of nostr itself, you find the community on:

• nostr CN/chinese telegram group - a chinese telegram group for nostr
• nostr discord - a discord server for nostr enthusiasts and developers
• nostr español/spanish telegram group - a spanish telegram group for nostr
• nostr francophone/french telegram group - a french telegram group for nostr
• nostr hk - Connecting everyone who is interested in nostr in HK so we can meet up and have fun
• nostr reddit - a subreddit for nostr related discussion
• nostr telegram group - a telegram group for nostr protocol discussion
• nostr RU/UA/BY telegram group - an eastern european community in telegram group for nostr

Tutorials

• How to set up a paid nostr relay
• How to: Run your own nostr relay (nostr-rs-relay, Caddy, no Docker)
• Nostr Newcomers Most Common Questions and Answers
• nostr workshop with super testnet
• Set up a nostr relay server in under 5 minutes
• Step-by-Step guide to set up a relay on your server (AWS, DigitalOcean, RaspBerry... )
• strfry personal relay - 10 minute setup of a personal nostr relay on a vanilla Linux VPS. Adds support for NIP-65.

Deprecated

• alphaama.com - is under maintenance as of late 2022.
• anigma.io - has known xss attack vulnerabilities, which can put private key at risk, or risk signing events you may not want to send.
• branle - a Twitter-like client that was discontinued but lives on in its fork "Astral".
• nvote - it does server side processing, and even private key is handled server side, and as such is deprecated for normal use.
• rsslay - a bridge that puts RSS feeds into Nostr

Other links

• inosta api - Expensive Image Hosting Service
  • api.inosta.cc - Backend live instance
  • inosta.cc- Demonstrator live instance
• Media caching server for Nostr - caches resized profile pictures and banners to save bandwidth for clients
• nostr icons - Purple, white, and black icons in various formats designed for nostr.
• nostr on YouTube
• nostr playground in Ruby
• nostr.build - nostr image uploader
• Nostrovia Podcast - A Nostr podcast covering all the new projects, all the new cool stuff, all the new NIPs
• search posts/profiles by keyword - posts from major relays indexed and searchable in real-time
• Summaries of all Nostr Improvements Proposals - ChatGPT generated summaries of all NIPs by k00b
• vanilla-js-nostr - a demo of posting and viewing a feed in nostr using vanilla javascript
• wellorder nostr datasets - Public standardized nostr datasets for benchmarking, data science, or other analysis.

Data for this list is contributed by the community and curated by @aaaljaz ( npub1aljazgxlpnpfp7n5sunlk3dvfp72456x6nezjw4sd850q879rxqsthg9jp)

Contributors