Looping - Fast community feedback on all your designs.
Design Business - Database of design agencies, news, and useful materials.
Visualtip - A service that allows designers and clients to annotate and collaborate on images in real time
Conceptzilla - Get competitive design for a fraction of the industry cost
LimeSurvey - LimeSurvey: the Online-Umfrage Tool - Open-Source Suryeys
Prevue - Give stunning design presentations, get fast client feedback