Sketchboard.io - Visual Remote Teamwork. Solve problems and create ideas on endless whiteboard with your teammates by sketching.
UI Garage - Specific mobile and web design patterns for your inspiration
Draw.Chat - Anonymous real-time whiteboard with text and video chat.
Muzli - UI/UX and Design Inspiration Chrome Extension
Bluescape - Bluescape is a visual collaborative workspace designed to elevate work that empowers creation, collaborate, and innovate across the entire enterprise.
Design Hunt - Curated design inspiration for everyone