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

• 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

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

• 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
• rsslay - a bridge that puts RSS feeds into Nostr
• nodestr - a Node.js implementation
• 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
• nostr-ts-relay - a nostr relay written in Typescript backed by PostgreSQL

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

• 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
• nvote, Nvote is a decentralized, vote-driven community similar to services like Reddit and HackerNews. Nvote is powered by nostr
  • nvote.co
• Minds - open source social network. Supports reading and creating posts using the Nostr protocol
• alphaama - playground by Tiago Balas
• Jester - Chess over nostr
• Sendstr - shared clipboard between devices 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.
• anigma - A clone of telegram built on nostr
• 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 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.

• Feature comparison of Nostr clients as of mid-2022

• 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
• 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-rs - a Rust implementation of the nostr protocol
  • ok300/nostr-rs - a more maintained fork of nostr-rs
• 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 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-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
• wen - browser extension for website enhancer with nostr
• nostrefresh - simple refresh function for nostr web pages
• nashboard - nostr network statistic
• 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 - a twitter to nostr bot
• nostr.com - 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
• nostr army knife - nostr army knife by fiatjaf
• joinstr - coinjoin implementation using nostr
• smtp nostr gateway - a bridge that forwards emails to pubkeys as encrypted direct messages
• 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.
• rana - Nostr mining pubkey with multi threading

Outside of nostr itself, you find the community on:

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

• nostr on YouTube
• vanilla-js-nostr - a demo of posting and viewing a feed in nostr using vanilla javascript
• nostr workshop with super testnet