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.

* Complete - Everything you need is there at your fingertips. * Carefully thought out - Keys behave the way you expect. * Consistent. - Commands are easy to learn. * Flexible - You won't need to reach for another program to finish an unusual task. * Customizable - It's easy to make small changes to fine-tune Epsilon's behavior just the way you want it. * Extensible - You can teach Epsilon brand-new tricks if you ever have to. * Features powerful built-in Emacs-style and Brief-style command sets * Incredible performance * Convenient built-in help