Spket IDE - IDE for JavaScript and XML development, with features to increase the productivity of Extension developers. WysiBB - Wysiwyg BBcode editor by Vadim Dobroskok. Cross-browser, mobile compatible. JSON Editor Online - Web-based tool to view, edit, and format JSON. JSFiddle - Test and share JavaScript, CSS, HTML or CoffeeScript online. CodeMirror - Versatile text editor implemented in JavaScript for the browser. JS Bin - Run and test JavaScript, HTML, CSS online. CodePen - HTML, CSS, and JavaScript online editor with sharing capabilities. Eclipse - Eclipse IDE for web developers. HTML, CSS, and XML. WebStorm - JavaScript IDE. Features AngularJS support, Spy.js tracing tool, Grunt and Bower integration. Liveweave - HTML5, CSS3 and JavaScript playground for web designers and developers. Scripted - Browser-based editor with an initial focus on JavaScript editing. It is served from a locally running Node.js server instance. Rendur - Edit HTML, CSS, and JavaScript via a floating popup. HTML5 Snippet - Playground and snippet sharing platform for web developers and designers. enyojs/ares-project - A browser-based code editor and UI designer for Enyo 2 projects. Ymacs - AJAX source code editor with syntax highlighting and automatic indentation. Provides some Emacs features. Ace - Embeddable code editor written in JavaScript. Features syntax highlighting, themes, automatic indentation, command line, customizable bindings, search and replace with regular expressions, matching parentheses, code folding and multiple cursors. BetterExamples.js - Small utility to show both logging and errors, right at the place where they are generated. For live examples. StructuredJS - Provides a simple interface for checking the structure of JavaScript code, backed by the abstract syntax tree generated by Esprima. Edit Area - Designed to edit source code files in a textarea. The main goal is to allow text formatting, search and replace and real time syntax highlight (for short text). Quill - Open source editor built for the modern web. Has an extensible architecture and an expressive API. Sir Trevor JS - Rich content editing made up of blocks easy to extend and customize. It does not store HTML, it saves JSON structures. CodeBook - Interactive programming environment. The goal of the project is to improve the programming experience by incorporating immediate feedback and direct interaction. Package Control: JavaScript - List of JavaScript packages for Sublime Text. Spy.js - Connects to a proxy server (node.js) to be able to trace, profile, debug and inspect runtime data.