RabbitMQ - RabbitMQ is an open source message broker software.
Wren - Offset your carbon footprint by saving rainforests
Ethereum - Ethereum is a decentralized platform for applications that run exactly as programmed without any chance of fraud, censorship or third-party interference.
EcoCart.io - Free e-commerce plugin for merchants to offer carbon neutral orders to their customers.
Hyperledger - Hyperledger is a multi-project open source collaborative effort hosted by The Linux Foundation, created to advance cross-industry blockchain technologies.
Klima - Go carbon neutral