The device art generator enables you to quickly wrap app screenshots in device artwork. This provides better visual context for your app screenshots on your website or in other promotional materials

Generate Product Screenshots in Realistic Environments

… is a nifty HTML5 App used to create wireframes, mockups or UI concepts, prototypes depending on how you like to call them.

A user-contributed collection of ready-to-use UI components and design patterns built using Balsamiq Mockups.

Download the desktop version of Balsamiq. Works offline, one-time purchase.