Bitcoin Core integration/staging tree

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

Mastering Bitcoin 3rd Edition - Programming the Open Blockchain

Bitwarden infrastructure/backend (API, database, Docker, etc).

Bitwarden client apps (web, browser extension, desktop, and cli).

Go ahead and axolotl questions

Bitcoin Improvement Proposals

Bitwarden mobile apps (Password Manager and Authenticator) for Android.

The desktop vault (Windows, macOS, & Linux).

A complete course for learning Bitcoin programming and usage from the command

Explore the full Bitcoin ecosystem with mempool.space, or be your own explorer and self-host your own instance with one-click installation on popular Raspberry Pi fullnode distros including Umbrel,…

The command line vault (Windows, macOS, & Linux).

A bitcoin blockchain explorer and API

Phoenix is a self-custodial Bitcoin wallet using Lightning to send/receive payments.

A comprehensive list of decentralized exchanges (DEX) of cryptocurrencies, tokens, derivatives and futures, and their protocols.

Chaumian ecash wallet and mint for Bitcoin

Lightning Address - like an email address, but for your Bitcoin

Easiest Bitcoin Lightning desktop app, for Windows, macOS, and Linux

⚡️ A minimalistic wallet GUI for c-lightning, accessible over the web or through mobile and desktop apps.

Documentation of Security Tokens and their uses.

Blockstream Green Wallet for Android

Some examples of Test-Driven Development for Infrastructure

Bitcoin resources (meetups, books, wallets, podcasts, conferences and much more)

Bitcoin Improvement Proposals

Liquid daemon and cli

Support bitcoin developers so they can focus on building our future.

Satpile.app

Introduction to Blockchain Tests for Test Automation University