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.
PyCharm - Python & Django IDE with intelligent code completion, on-the-fly error checking, quick-fixes, and much more...
Boostnote - Boostnote is an open-source note-taking app.
Thonny - Python IDE for beginners
iPython - iPython provides a rich toolkit to help you make the most out of using Python interactively.
Spyder - The Scientific Python Development Environment