SpeQ Mathematics - SpeQ is a small, extensive mathematics program with a simple, intuitive interface.

Observable Notebooks - The portfolio and technical blog of Chris Henrick – provider of professional web development, data visualization, GIS, mapping, & cartography services.

Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.

Jupyter - Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.

NumWorks - The graphing calculator that makes learning math easier.

BeakerX - Open Source Polyglot Data Science Tool