Apps similar to Hacker Pad include Notepad++, which is free and open source. Other options are Visual Studio Code, Sublime Text, VSCodium and Vim. Text Editors like Hacker Pad are a crowded field, with more than 100 alternatives for Windows, Linux, Mac, Chrome OS and the web.
SciTE is a SCIntilla based Text Editor. Originally built to demonstrate Scintilla, it has grown to be a generally useful editor with facilities for building and running programs. It is best used for jobs with simple configurations - I use it for building test and demonstration...
Australia
A lightweight yet powerful IDE/code editor that comes in both Web and desktop editions, the latter written with PHP and including choices for several platforms (Windows, Linux, Mac).
United Kingdom
A text editor forked from Pluma and Gedit. Xed is the default text editor of Linux Mint. It can be customized and is available in multiple languages.
Ireland
EU
Vim inspired text editor with support for multiple selections and scores of other "out of the box" features.
FranceEU
Textadept is a fast, minimalist, and ridiculously extensible cross-platform text editor for programmers. Written in a combination of C and Lua and relentlessly optimized for speed and minimalism over the years, Textadept is an ideal editor for programmers who want endless...
United States
A simple text editor for the Xfce desktop environment. Mousepad aims to be an easy-to-use and fast editor for quickly editing text files, not a development environment or an editor with a huge bunch of plugins.
GermanyEU
jEdit is a mature programmer's text editor with hundreds (counting the time developing plugins) of person-years of development behind it. jEdit beats many expensive development tools for features and ease of use AND it is released as free software with full source code...
Notepad more focused on developing than just scribble down notes.
These is not an exhaustive feature list, but gives you some idea of the features present in Programmer’s Notepad.
United Kingdom
Code smarter and faster with Komodo IDE, the cross-platform professional development environment for dynamic languages and open technologies. Komodo's award-winning feature set includes standard editor functionality like code formatting, commenting, auto-indent and syntax...
Canada
Builder is an actively developed Integrated Development Environment for GNOME. It combines integrated support for essential GNOME technologies such as GTK+, GLib, and GNOME APIs with features that any developer will appreciate, like syntax highlighting and snippets.
United States
Orwell Dev-C++ is a Portable (IDE) Integrated Development Environment and Compiler for the C++ programming language.
