Maqetta : Maqetta is an open source project that provides WYSIWYG visual authoring of HTML5 user interfaces. The Maqetta application itself is authored in HTML,...
RegExr : RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
code2flow : Interactive code to flowchart converter. Turn your workflows, algorithms and manuals into easy to understand diagrams via simple code.
Etherpad is an Open Source online editor providing collaborative editing in really real-time powered by Node.js
