coffeescript

Compile Less, Sass, Scss, Stylus, Jade, Coffeescript, Haml and Markdown with live browser refresh.

Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, Facebook, Twitter, chat and e-mails.

JetBrains WebStorm is a commercial IDE for JavaScript, CSS & HTML built on JetBrains' IntelliJ IDEA platform.

ZeroNet uses cryptography (Bitcoin library) and BitTorrent DHT (centralized trackers) to build a distributed censorship-resistant network.