* [Reacton v1.11.0](https://github.com/widgetti/reacton) – React-like component framework for building reusable web-based UIs in Python with ipywidgets.

* [Lumino v2026.10.8](https://github.com/jupyterlab/lumino) – JavaScript packages providing widgets, layouts, events, and data structures for building high-performance desktop-like web applications.