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Atom is open source. Be part of the Atom community or help improve your favorite text editor. Make it your editor Packages Choose from thousands of open source packages that add new features and functionality to Atom, or build a package from scratch and publish it for everyone else to use. Themes Atom comes pre-installed with four UI and eight syntax themes in both dark and light colors. Can't find what you're looking for? Install themes created by the Atom community or create your own. Customization It's easy to customize and style Atom. Tweak the look and feel of your UI with CSS/Less, and add major features with HTML and JavaScript. Under the hood Atom is a desktop application built with HTML, JavaScript, CSS, and Node.js integration. It runs on Electron, a framework for building cross platform apps using web technologies. [hide][Hidden Content]]