Design Pickle - Unlimited graphic design services for flat monthly fee
Usersnap - Visual Feedback - Usersnap helps your business with its versatile feedback platform to build better, more successful products and services with the help of user feedback. Collect feedback along your product development lifecycle. Try it for free.
Snappa - The perfect graphic design tool for digital marketers.
Feedback by Pixelic - Painless design feedback and version control.
ManyPixels - Unlimited, on-demand design services for freelancers, startups, and agencies.
Sesov - A community for anonymous design feedback