Atom is described as 'Open-source, Electron based text editor with a massive ecosystem of plugins and themes that are easily accessible through a built-in package manager. Being built with Electron, it uses web technology (HTML, CSS, JavaScript and Node' and is a leading Code Editor in the development category. There are more than 100 alternatives to Atom for a variety of platforms, including Windows, Linux, Mac, BSD and Web-based apps. The best Atom alternative is Visual Studio Code, which is free. Other great apps like Atom are Notepad++, Sublime Text, Vim and VSCodium.
Great editor which modernize definitely Vim!