Microsoft Visual Studio
About Visual Studio Code
From wikipedia: Visual Studio Code is a free source-code editor made by Microsoft for Windows, Linux and macOS. Features include support for debugging, syntax highlighting, intelligent code completion, snippets, code refactoring, and embedded Git. Users can change the theme, keyboard shortcuts, preferences, and install extensions that add additional functionality.
Visual Studio Code's source code comes from Microsoft's free and open-source software VSCode project released under the permissive Expat License, but the compiled binaries are freeware for any use.
Visual Studio Code is available for download via https://code.visualstudio.com/Download.