Kate is described as 'The Kate project develops two main products: KatePart, the advanced editor component which is used in numerous KDE applications requiring a text editing component, and Kate, a MDI text editor application' and is a very popular Text Editor in the Development category. There are more than 100 alternatives to Kate for a variety of platforms, including Windows, Linux, Mac, BSD and Chrome OS. The best alternative is Visual Studio Code, which is free. Other great apps like Kate are Notepad++ (Free, Open Source), Atom (Free Personal, Open Source), Sublime Text (Free Personal) and Vim (Free, Open Source).
Visual Studio Code is more than just a code editor, it provides the tools and extensions to compile, debug, compare, refactor, and even manage code repositories all within a highly-customised development environment.
GNU nano is a small and friendly text editor. Besides basic text editing, nano offers many extra features like an interactive search and replace, go to line and column number, auto-indentation, feature toggles, internationalization support, and filename tab completion.
GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. The features of GNU Emacs include: