Atom (Open Source) - A hackable text editor for 21st Century

Atom is a free and open-source text and source code editor for OS X, Linux, and Windows. It provides support for plug-ins written in Node.js, and embedded Git Control, developed by GitHub.

You can visit official site of Atom on below link:

https://atom.io/

You can easily download Atom from below link. It’s Open Source Text Editor.

http://flight-manual.atom.io/getting-started/sections/installing-atom/ 


Features of Atom:

1. Cross Platform Editing
Atom can work on any OS like Windows, Linux or OS X.

2. Built In Package Manager
You can search and install new packages. Even you can create your own.

3. Auto completion
Atom automatically completes your code once you write starting character or a word.

4. File System Browser
You can easily browse single file, multiple files or even whole project at a time.

5. Grammar Selection
You can set grammar selection according to file type so that proper color identification and intelligence can get from Atom.

Atom is a desktop application built using web technologies like HTML, CSS, Javascript and Node.Js. Atom is based on Electron (formerly known as Atom Shell), a framework.

Atom also enables cross-platform desktop applications using Chromium and io.js, which is also developed by GitHub. It is written in Less and CoffeeScript. 

Atom can also be used as an IDE. Atom was released from beta, as version 1.0, on June 25, 2015.Its developers call it a "hackable text editor for the 21st Century".