Cashu is a Chaumian ecash system built for Bitcoin. It has full Lightning integration and can run on different Lightning node implementations.
A Cashu mint does not know who you are, what your balance is, or who you're transacting with. And that's how things should be.
Cashu has a command line interface (CLI) and is also available as a Progressive Web App (PWA). Add it to your Home screen to get a native app experience.
Cashu is a library that developers can integrate into their existing services. It is integrated into LNbits as a Python library.