Looping - Fast community feedback on all your designs.
Invision - Prototyping and collaboration for design teams
LimeSurvey - LimeSurvey: the Online-Umfrage Tool - Open-Source Suryeys
Red Pen - Red Pen lets you upload your design, share a short URL, and get live, annotated feedback super-fast.
Pastel - Sticky note-based feedback collection tool for live websites
Focus To-Do - Be focused and make things easier.