After months of testing and loads of hands-on feedback from tens of thousands of users, GitHub's programmable text editor Atom is now available for the general public to download. Its pricetag: free, with its source code available under the MIT license -- an ideal choice to quell any lingering questions about its licensing or monetization method.
Atom's main claim to fame is its hackability and extensability. Created by using Google's Chromium for its display engine and Node.js for its backend, Atom allows its functionality to be extended by either third parties or the end user by way of packages written in CoffeeScript or JavaScript.