Beaver Editor is described as 'Beaver is an Early AdVanced EditoR. Beaver is a GTK+2 editor designed to be Light-Weight, Modular and Stylish' and is an app in the Development category. There are more than 50 alternatives to Beaver Editor 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 Beaver Editor are Notepad++ (Free, Open Source), Atom (Free, Open Source), Vim (Free, Open Source) and VSCodium (Free, Open Source).
VS 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.
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.
CudaText is a cross-platform text editor, written in Lazarus. It starts quite fast (0.5 sec with ~30 plugins on CPU Intel Core i3 3Hz). It is extensible by Python add-ons (plugins, linters, code tree parsers, external tools).