Free Web Developer IDE
MS WebMatrix
Aptana Studio
Komodo
Eclipse
Netbeans
Microsoft Visual Studio Express
BlueGriffon
Bluefish
Brackets
Google Web Designer
Cloud IDE
Cloud9
Codeanywhere
Exo Cloud
Koding
Eclipse Orion
Liveweave <-
CodeRun Studio
CKEditor
Codio
Editores
Notepad++
Emacs
TextWrangler (Mac)
Kompozer
Weebly
Amaya
Wix Website Builder
Aloha Editor
Trellian Webpage
Mercury Editor
Maqetta
eXe - the eLearning XHTML editor
Codepen
RJ TextEd
Scintilla
jHtmlArea
Web Browser Based
Chrome Developer Tools
Mozilla Firebug
Easy JsBin
Phoenix
Coding the Web
Sourcekit
Web Developer
HTML Instant
jsdo.it
Best Online WYSIWYG HTML Editor
JavaScript Frameworks
AngularJS
Atoms.js
DHTMLX
Dojo
Ext JS
GWT (Java)
jQuery
Prototype Script.aculo.us
YUI
Comparison of JavaScript frameworks