
Description: Darkwallet is a private, decentralized bitcoin wallet that aims to make bitcoin transactions anonymous. It uses peer-to-peer connections, stealth addresses, and CoinJoin transactions to increase anonymity of bitcoin payments.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Bitcoin Knots is an alternative Bitcoin client that emphasizes privacy, security and self-governance. It is derived from Bitcoin Core but with improvements to scalability, privacy and governance.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API