Notism - What's next after wireframes? Visual Design and Notism.
The Design Quiz - The Design Quiz is the place for digital designers to test their knowledge in User Experience, User Interface and Graphic Design and learn something new.
Invision - Prototyping and collaboration for design teams
Scrapd - Helping you collect and store creative resources for your projects
Red Pen - Red Pen lets you upload your design, share a short URL, and get live, annotated feedback super-fast.
DesignBro - DesignBro is the world’s highest quality design crowdsourcing marketplace, focused around a selected community of leading designers.