KDE Advanced Text Editor (KATE) is a free and opensource text editor. Developed by Christoph Cullmann
License: Open Source
Apps available for Windows Linux BSD KDE
Aquamacs is an Emacs text editor for macOS. Developed by David Reitter
Apps available for Mac OS X
Kate is a lightweight and user-friendly text editor, ideal for basic editing and quick tasks, while Aquamacs offers the full power of Emacs with extensive customization options, making it suitable for advanced users who need more complex features.