Looping - Fast community feedback on all your designs.
Invision - Prototyping and collaboration for design teams
ClassMarker - The ClassMarker online testing website, is a professional, easy to use, online quiz maker that marks your tests and quizzes for you. Create online quizzes free quiz maker. Web-based online testingWeb-based online testing service | Free quiz maker.
Red Pen - Red Pen lets you upload your design, share a short URL, and get live, annotated feedback super-fast.
Google Forms - Simple web forms from Google.
Pastel - Sticky note-based feedback collection tool for live websites