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

Protocol

• nostr - overview and FAQ
• NIPs - the "Nostr Implementation Possibilities" describe the protocol in technical detail
• nostr, a basic tour - an intro to nostr
• Nostr: Solucionando la censura de una vez por todas
• UseNostr - A small guide for anyone who wants to learn more about how nostr works and what it can do.
• nostr.how - Quick-start to onboard desktop users with Alby & Astral

Relays

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

Implementations

• NNostr - a C# relay
• nostr-rs-relay - a minimalistic relay written in Rust that saves data on SQLite
• Relayer Basic - a simple relay based on relayer backed by Postgres
• nodestr - a Node.js implementation
• sovereign-stack - a tool that helps you deploy nostr relays and create self-hosted (bitcoin-only) Value4Value websites.
• expensive relay- a relay that requires payment for registration
• 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
• NostrPostr Relay - a Kotlin Relay supporting both SQLite and Postgresql
• nostrypy - relay, client, and other tooling in python
• nostream - a nostr relay written in Typescript backed by PostgreSQL (renamed from nostr-ts-relay)
• nostr_relay – a nostr relay written in python, backed by SQLite
• søstr – a private nostr relay written in rust, saves all notes from one pubkey and publish them to anyone that requests them
• knostr – a nostr relay implemented in Kotlin with support for Postgres and metrics(micrometer).

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

• branle - a Twitter-like client with chat. Some instances:
  • branle.netlify.app - by fiatjaf
  • nostr.rocks
  • branle.wlvs.space
  • branle tor - on tor
• astral - a branle fork with global feed and UI makeover
  • astral.ninja
• damus - a twitter-like nostr client for iOS and MacOS
  • damus on testflight
• more-speech - desktop client for nostr written in Clojure
• futr - nostr client desktop app written in Haskell
• Minds - open source social network. Supports reading and creating posts using the Nostr protocol
• Jester - Chess over nostr
• Sendstr - shared clipboard between devices over nostr
• nosbin - pastebin over nostr
• noscl - a basic command-line client written in Go
• loquaz - a desktop app written in Rust for direct encrypted chat
• nostr console - a nostr command line client written in Dart. Binaries available for Windows, Linux, and MacOS
• ArcadeCity - Public group chats and P2P services (WIP) over nostr
• 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
• scalastr - A barebones nostr client written in scala
• Nostros - A nostr mobile client for Android
• NostrEmitter - Simple E2E encrypted client and EventEmitter object
• Lightning.Pub - A nostr daemon for Lightning nodes
• shockwallet - A Lightning wallet that uses nostr and lnurl to connect to nodes
• coracle - A nostr web client
• nostrweb - another nostr web client in vanilla JS
  • nostr.ch - live instance
• Bija - A desktop client written in python. Currently Linux only
• Nosky - A native Android client for Nostr. Still in development
• Stackerstan - A decentralised organisation built on Bitcoin and Nostr, implemented as a replicated state machine in Golang
• nostr-java - A nostr client API written in java, for generating, signing and publishing events to relays
• bolt.fun - A bitcoin lightning makers community that supports reading and creating comments using Nostr
• iris - A nostr web client
• gossip - A desktop client in rust presented with egui
• Attached - Open-Source ReactNative Expo app for Nostr (iOS, Android). Currently under app stores review.
• Member - Progressive Web App Client. Works on desktop and mobile.
  • member.cash - live instance
• dispute - A cross-platform (Linux, Android, iOS, MacOs, Windows and Web) client for NOSTR
• Snort - Nostr UI written in react
  • snort.social
• Hamstr - A twitter-style web client based on astral
  • hamstr.to
• Nozzle - A Twitter-like native Android client written with Jetpack Compose
• 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
• Nostrid - Multi-platform client currently offering binaries for Android and Windows.
  • Nostrid.Web - A preview version of Nostrid running completely on the browser. It can be installed locally as PWA.

Client reviews and/or comparisons

• Feature comparison list of Nostr clients

Libraries

• nostr-ruby - a Ruby implementation of the nostr protocol
• NNostr.Client - a C# Nostr library for use by clients
• nostr-tools - a JavaScript client that abstracts the relay management code for use by clients
• nostr-relaypool-ts - a TypeScript relay pool library on top of nostr-tools that simplifies handling subscriptions to multiple servers
• nostr-react - React Hooks for Nostr
• go-nostr - a Go library that implements relay management, plus event encoding and signing utils
• nostr_rust - Functional Rust implementation of the nostr protocol
• nostr-js - a javascript implementation of the nostr protocol
• nostr-rs - a Rust implementation of the nostr protocol
• nostr-rs-sdk - Nostr protocol implementation, SDK, and FFI written in Rust
• relayer - a server framework for writing custom relays
• NostrPostr - a Kotlin Nostr library for clients or relays
• python-nostr - a python library for making clients
• nostr-bot - a Rust library for writing bots
• NostrKit - a Swift library for interacting with relays
• nostr-relay-inspector![stars](https://img.shields.io/github/stars/dskvr/nostr-relay-inspector.svg?style=social - A library that returns useful information about relays based on nostr-js
• schorr_snap - A snap plugin for Metamask Flask, supports nostr
• nostr-deno - a client library for Deno javascript runtime.
• nostr-types - a rust library defining types useful for the nostr protocol
• dart-nostr - a Dart library for Flutter

Bridges and Gateways

• rsslay - a bridge that puts RSS feeds into Nostr
• smtp nostr gateway - a bridge that forwards emails to pubkeys as encrypted direct messages
• matrix-nostr-bridge a simple Matrix-to-Nostr or Nostr-to-Matrix bridge

Tools

• git-nostr-tools - A cli tool for sending code patches over nostr
• nostr-cln-events - A CLN plugin to push clightning node events to nostr
• nostr registry - a database of known relays with their uptime and NIP support tables
• nostr-fzf - Nostr Directory; a tool for searching usernames and channels
• nostr-notify - desktop nostr notifications using libnotify
• nostr-launch - a tool for launching a bunch of relays and clients locally for development and testing
• nos2x - nostr signer extension - a browser extension for signing events on 3rd party site without sharing your private keys with them
• nostr GitHub Action - send events from GitHub Actions
• nostrefresh - simple refresh function for nostr web pages
• anonroom - anonymous chat room inside nostr
• nostril - C cli tool for creating nostr events
• nostr-rs-relay-compose - a Docker compose deployment for nostr-rs-relay with SSL support based on Traefik
• tostr![stars](https://img.shields.io/github/stars/slaninas/tostr.svg?style=social - a twitter to nostr bot
• nostr.guru - a nostr web gateway for viewing events by their ID
• nostrandom.netlify.app - generate publish-able Nostr event with random keys
• nashboard - a Nostr network dashboard with network statistics, reachable here
• nostr army knife - nostr army knife by fiatjaf
• joinstr - coinjoin implementation using nostr
• ndxstr - nostr's layer 2 indexing nodes, with more advanced querying capability than currently supported by relays
• nostrillery - a tool for running performance tests against Nostr relays
• nostr-terminal - SSH-like access to your machine via web terminal, powered by Nostr.
• nostcat - cat-like nostr client for scripting and debugging written in Rust
• rana - Nostr mining pubkey with multi threading
• nostreq - Nostr relay event request generator
• nostr.io - network statistics with last published notes, top 50 publishers, and top 50 followed users
• nostr-commander - simple but convenient CLI-based Nostr app for following users, sending DMs, etc.
• nostr.directory - searchable database of nostr users and their other social media links.
• nostr-tool - Rust CLI tool to generate and publish events
• nostrplebs - A NIP-05 ID registration service.
• frostr - Create joint nostr identities and require t-of-n signatures to post
• plebs.place - A NIP-05 ID registration service (in portuguese).
• nostr.rest - Mine proof of work public keys with user specified prefixes
• lnpass - A key manager for Lightning and nostr.
• sb.nostr.band - Search bots that you can create and follow to receive new posts matching a keyword right into your feed.

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
• nos2x - Nostr Signer Extension
• wen - browser extension for website enhancer with nostr
• Blockcore - Multi wallet browser extension with nostr support

Community

Outside of nostr itself, you find the community on:

• nostr telegram group - a telegram group for nostr protocol discussion
• nostr reddit - a subreddit for nostr related discussion

Tutorials

• Step-by-Step guide to set up a relay on your server (AWS, DigitalOcean, RaspBerry... )
• Set up a nostr relay server in under 5 minutes
• nostr workshop with super testnet
• Nostr Newcomers Most Common Questions and Answers

Deprecated

• anigma.io - has known xss attack vulnerabilities, which can put private key at risk, or risk signing events you may not want to send.
• nvote - it does server side processing, and even private key is handled server side, and as such is deprecated for normal use.
• alphaama.com - is under maintenance as of late 2022.

Other links

• nostr on YouTube
• vanilla-js-nostr - a demo of posting and viewing a feed in nostr using vanilla javascript
• nostr playground in Ruby
• search posts/profiles by keyword - posts from major relays indexed and searchable in real-time
• nostr.build - nostr image uploader
• wellorder nostr datasets - Public standardized nostr datasets for benchmarking, data science, or other analysis.
• Nostrovia Podcast - A Nostr podcast covering all the new projects, all the new cool stuff, all the new NIPs
• Summaries of all Nostr Improvements Proposals - ChatGPT generated summaries of all NIPs by k00b

Data for this list is contributed by the community and curated by @aaaljaz.