Notepad++

Notepad++ is a free, open-source text and source code editor for Windows. It supports many programming languages, including Python, with configurable syntax highlighting and code folding.

It includes useful editing and navigation features, such as regex-capable search and replace, multi-caret and multi-edit features, and column editing. It also support macros for task automation and allows you to run external commands via the built-in Run menu.

Notepad++ is extensible via plugins. Most installations include the Plugins Admin option to install, update, and remove plugins.

For deeper Python integration, the third-party PythonScript plugin adds a REPL and programmatic access to Notepad++/Scintilla features.

Official website: notepad-plus-plus.org