Judge0 IDE is described as 'Free and open-source online code editor that allows you to write and execute code from a rich set of languages. It's perfect for anybody who just wants to quickly write and run some code without opening a full-featured IDE on their computer' and is a Code Editor in the development category. There are more than 100 alternatives to Judge0 IDE for a variety of platforms, including Windows, Mac, Linux, BSD and Web-based apps. The best Judge0 IDE alternative is Notepad++, which is both free and Open Source. Other great apps like Judge0 IDE are Visual Studio Code, Sublime Text, VSCodium and Vim.