Leo Editor

Leo is:

A fully-featured IDE, with many features inspired by Emacs.
An outliner. Everything in Leo is an outline.
A data manager and personal information manager.
A powerful scripting environment.
A tool for organizing and studying computer code.
Extensible via a simple plugin architecture.
A tool that plays well with IPython, Vim and Emacs.
Written in 100% pure Python

Run leo-editor from a terminal to get started once the snap is installed.