RabbitMQ - RabbitMQ is an open source message broker software.
UpNote - A beautiful and clean cross-platform app for notes organizer
Ethereum - Ethereum is a decentralized platform for applications that run exactly as programmed without any chance of fraud, censorship or third-party interference.
Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.
Note Board - Productivity app. Save information like a sticky notes.