Explore the critical role of open source and open development in blockchain, digital identity, and digital wallets in this insightful conference talk. Delve into the history and overview of Linux Foundation projects focused on blockchain, interoperability, identity, and digital wallets. Discover key use cases already in production, including CBDCs, supply chain, digital identity, and tokenization. Learn about the need for an open wallet engine to build interoperable, secure, and privacy-protecting wallets. Understand how open source and open development provide the foundation of trust underpinning these platforms. Gain valuable insights into topics such as decentralization, hybrid blockchain, global network of networks, and the importance of interoperability in the evolving digital landscape.