Observable - Interactive code examples/posts
Numi App - Numi is a beautiful text calculator for Mac.
nbviewer.org - Rackspace server host Jupyter Notebooks from your github repo
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
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.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.