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.
Kajero - Interactive JavaScript notebooks - create good-looking, responsive, interactive documents.
Soulver - Soulver is a software application that functions as a calculator that allows you type a continuous stream of information rather than having to input data into multiple cells.
Calculist - The open-source, web-based thinking tool that facilitates effective thinking for solving problems.