MindMeister : MindMeister is an online mind mapping tool that lets you capture, develop and share ideas visually.
Maqetta : Maqetta is an open source project that provides WYSIWYG visual authoring of HTML5 user interfaces. The Maqetta application itself is authored in HTML,...
W3C mobileOK Checker : This checker performs various tests on a Web Page to determine its level of mobile-friendliness.
