Ethereum - Ethereum is a decentralized platform for applications that run exactly as programmed without any chance of fraud, censorship or third-party interference.
wxWidgets - wxWidgets: Cross-Platform GUI Library
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.
Electron - Build cross platform desktop apps with web technologies
BigchainDB - The scalable blockchain database.
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.