marimo is free and open source, available on GitHub. This blog post is also accompanied by a YouTube video. In a previous post, on lessons learned redesigning the Python notebook, we wrote: A lot of important work happens in notebooks — research, large scale experimentation, data engineering, and more. But this kind of work should be treated as Python software, and it shouldn’t be done in error-prone JSON scratchpads. In that post we described design decisions that allowed us to create a new kin...