GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.

Pandas - Pandas is an open source library providing high-performance, easy-to-use data structures and data analysis tools for the Python.

Dr. Geo - Dr. Geo, a software to design & manipulate interactive geometric sketches.

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.

Giac/Xcas - Free computer algebra system

PyCharm - Python & Django IDE with intelligent code completion, on-the-fly error checking, quick-fixes, and much more...