Bitcoin Core integration/staging tree

LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.

Solidity, the Smart Contract Programming Language

Monero: the secure, private, untraceable cryptocurrency

Multipass orchestrates virtual Ubuntu instances

bcrypt for NodeJs

Zcash - Internet Money

Decentralized cryptocurrency blockchain daemon implementing the XRP Ledger protocol in C++

Open Source implementation of advanced blockchain features extending the Bitcoin protocol

Iroha - A simple, decentralized ledger

*UNMAINTAINED* Decompiler and Security Analysis tool for Blockchain-based Ethereum Smart-Contracts

The privacy-focused cryptocurrency

Concord byzantine fault tolerant state machine replication library

Boulder's archived fork of google/certificate-transparency. Not used any more.

Official Sparkster Decentralized Cloud Implementation