Codeimg.io - Create and share images of your source code
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.
Carbonize - Beautiful images of code by Carbon, natively on your Mac
Feedback by Pixelic - Painless design feedback and version control.
Screely - Screely instantly generates dribbble-ready images. Simply upload your screenshot and we'll do the rest.
Sesov - A community for anonymous design feedback