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Ace is a standalone code editor written in Javascript. Ace is developed as the primary editor for Cloud9 IDE and the successor of the Mozilla Skywriter project. Ace can be easily embedded into any existing web page. It could provide Syntax highlighting, Auto indentation, key bindings including VI and Emacs modes, Themes, Search and replace and lot more.

Personal Webiste Editor

PWEditor is a professional web development tool, enabling users to efficiently design, develop and maintain websites both online and offline. It includes WYSIWYG html editor, CSS editor, JS editor and text editor. It works with Firefox, Mozilla and IE.

TinyMCE - The JavaScript Rich Text editor

TinyMCE is a platform independent web based Javascript HTML WYSIWYG editor control. It has the ability to convert HTML TEXTAREA fields or other HTML elements to editor instances. TinyMCE is very easy to integrate.

SeaMonkey - All-in-one internet application suite

The SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet application suite. It contains an Internet browser, email & newsgroup client with an included web feed reader, HTML editor, IRC chat and web development tools. Under the hood, SeaMonkey uses much of the same Mozilla source code which powers such successful siblings as Firefox and Thunderbird.

Imhotep CMS

Imhotep is a php professional CMS based on web blocks with a powerfull block html caching publishing system. Default database is mysql. Wysiwyg css and html editor. Image editor. Mozilla and Internet explorer compatible.

Codelobster - Free Portable IDE for PHP/HTML/CSS/JavaScript Development

Codelobster PHP Edition streamlines and simplifies php development process. It provides HTML editor, HTML code inspector, CSS editor, JavaScript editor, PHP editor, PHP debugger and lot more.

ICECoder - Web IDE / Browser Code Editor

ICEcoder is a web IDE / browser based code editor, which allows you to develop websites directly within the web browser. It uses the brilliant CodeMirror for code highlighting & editing, with a slick IDE wrapped around it to make the whole thing work. It supports code editing for HTML, CSS, LESS, JavaScript, CoffeeScript, PHP & Ruby.

FreeTextBox - HTML editor for ASP.NET

FreeTextBox is the most-used HTML editor for ASP.NET. It is compatible with IE on the PC, and Mozilla and Firefox on all platforms. It is used in major Open Source projects such as Community Server and DotNetNuke as well as excellent packages like Smarter Mail.

Visual Studio Code - Code editing. Redefined

Visual Studio Code is a new type of tool that combines the simplicity of a code editor with what developers need for their core edit-build-debug cycle. Code provides comprehensive editing and debugging support, an extensibility model, and lightweight integration with existing tools.

AIE (Ajax-Image-Editor)

AIE (Ajax-Image-Editor), formely known as Akoie is a rich internet application for manipulating images online. It works with Mozilla Firefox and Internet Explorer. It uses HTML, JavaScript and Ext JS on client side and ImageMagick and PHP on server side.

Emmet — The Essential Toolkit for Web Developers

Emmet (formerly Zen Coding) is a web-developer’s toolkit that can greatly improve your HTML & CSS workflow. With Emmet, you can type CSS-like expressions that can be dynamically parsed, and produce output depending on what you type in the abbreviation. Emmet is developed and optimised for web-developers whose workflow depends on HTML/XML and CSS, but can be used with programming languages too.

Wymeditor - Web-based XHTML editor

WYMeditor is a web-based WYSIWYM (What You See Is What You Mean) XHTML editor (not WYSIWYG). WYMeditor has been created to generate perfectly structured XHTML strict code, to conform to the W3C XHTML specifications and to facilitate further processing by modern applications.

Brackets - An open source code editor for the web, written in JavaScript, HTML and CSS

Brackets is a modern text editor that makes it easy to design in the browser. It's crafted from the ground up for web designers and front-end developers. It supports Inline editing, Preprocessor like LESS and SCSS support, Live preview support, make changes to CSS and HTML and you can instantly see those changes on screen.


Gendesing is WYSIWYG HTML Editor for Gnome, using Gtk+ and gecko from mozilla, the change properties of element is in realtime, in html view and source html, include suport php and css

Checky for Firefox, Mozilla, Netscape

Checky is an easy to use interface to many online validation and analysis services. Validate, analyze and view documents containing HTML, XHTML, CSS, RDF, RSS, XML, P3P, hyperlinks and metadata. Check Section 508 and WAI compliance of your documents.


KompoZer is a wysiwyg HTML editor using the Mozilla Composer codebase. As Nvu's development has been stopped in 2005, KompoZer fixes many bugs and adds a few useful features.

CodeMirror - In-browser code editing

CodeMirror is a JavaScript library that can be used to create a relatively pleasant editor interface for code-like content. It could be easily integrated in to your webpage. It supports JavaScript, XML/HTML, CSS, Python, PHP, diff, C, Java, sTeX, LaTeX, Haskell, Smalltalk, reStructuredText and PL/SQL. It also supports features like Autocompletion, Search/replace, Highlighting the current line.

HTML Validator for Mozilla and Firefox

HTML Validator is an Mozilla extension that adds HTML validation to Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon in the status bar when browsing. The details are seen when looking the HTML source of the page.

Composite C1 - CMS on .NET 4 platform

C1 is aimed at communicators who need to easily manage content on corporate websites while maintaining a consistent visual identity. C1 comes fully featured, it's straightforward to use, easy to extend, and integrates with other systems beautifully.

Composer - SWT HTML Editor Widget

A fully SWT integrated WYSIWYG HTML editing widget for Eclipse Platform based on Mozilla Editor