Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol.

match command-line arguments to their help text

The LBRY SDK for building decentralized, censorship resistant, monetized, digital content apps.

Meet BigchainDB. The blockchain database.

Repository for the book

*This project is no longer actively maintained. If you'd like to become the maintainer, please let us know.* ZeroDB is an end-to-end encrypted database. Data can be stored and queried on untrusted …

Generate links that users can use to submit messages encrypted with your public key.

A desktop GUI for Bitcoin Core optimised to work with hardware wallets

Bitcoin CoinJoin implementation with incentive structure to convince people to take part

Very basic blockchain-free cryptocurrency PoC in Python

This ATM sends bitcoin over the Lightning Network - pretty fun.

Community curated plugins for core-lightning

The Eye of Satoshi - Lightning Watchtower

A treasure trove of transcripts associated with Bitcoin and Lightning Network

Command-line, (SLIP39) sharded wallet designed for air-gapped deployments

This project is a secure Bitcoin brainwallet app written in Python.

A hands-on tutorial about building digital cash (Bitcoin)

A stateless, QR-airgapped hobbyist hardware wallet

Lightning BOLT Protocol Test Framework

Prototype bitcoin vault: cold storage and theft minimization

Creating a test corpus for a lightning network with 1M public channels

Quickbooks Online Connector for BTCPay Server

bitcoin-qt for lightningd

Blockstream Satellite API

lightning payable e-bike

A collection of c-lightning plugins which are ready to use for your lightning network node.

btclib: a Python3 library for 'bitcoin cryptography'

C-lightning on Android