RoundPic : Online tool for making anti-aliased rounded corners (very Web 2.0!) for avatars and images
Unsplash : All photos published on Unsplash can be used for free. You can use them for commercial and noncommercial purposes.
Maqetta : Maqetta is an open source project that provides WYSIWYG visual authoring of HTML5 user interfaces. The Maqetta application itself is authored in HTML,...
Audio Shop : Your friendly neighborhood script for mangling images or video using audio editing tools.
Mind42 : Collaborative mind mapping in your browser
Powerful graphics editor for your web browser and pc