Cross-platform editing: Atom works across operating systems. You can use it on OS X, Windows, or Linux. Built-in package manager: Search for and install new packages or start creating your own from within Atom. Smart autocompletion: Atom helps you write code faster with a smart, flexible autocomplete. File system browser: Easily browse and open a single file, a whole project, or multiple projects in one window. Multiple panes: Split your Atom interface into multiple panes to compare and edit code across files. Find and replace: Find, preview, and replace text as you type in a file or across all your projects. Packages: You 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. If you can't find what you're looking for, you can also install themes created by the Atom community or create your own. Customization: It's easy to customize and style Atom. You can 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.

* Content-aware editing modes, including syntax coloring, for many file types. * Complete built-in documentation, including a tutorial for new users. * Content-aware editing modes, including syntax coloring, for many file types. Complete built-in documentation, *including a tutorial for new users. Full Unicode support for nearly all human scripts. * Highly customizable, using Emacs Lisp code or a graphical interface. * An entire ecosystem of functionality beyond text editing, including a project planner, mail and news reader, debugger interface, calendar, and more. * A packaging system for downloading and installing extensions. * A packaging system and interface (M-x list-packages) for downloading and installing extensions. A default package archive is hosted by GNU and maintained by the Emacs developers. * Support for displaying and editing bidirectional text, including right-to-left scripts such as Arabic and Hebrew. * Support for lexical scoping in Emacs Lisp. * Improvements to the Custom Themes system (M-x customize-themes). * Unified and improved completion system in many modes and packages. * Built-in support for GnuTLS, GTK+ 3, ImageMagick, SELinux, and Libxml2.