Xnapper - Take beautiful screenshots instantly

Snip&Sketch - Quickly annotate screenshots, photos and other images with your pen, touch, or mouse and save, paste or share with other apps.

Pika.style - A free tool to quickly convert screenshots into beautiful website and device mockups. You can create customizable images for App Store, Instagram, and more

Picosmos Tools - Picosmos Tools integrates picture browsing, editing, layout, frames, and cosmetic effects into one set. It also provides plenty of source material.

Screely - Screely instantly generates dribbble-ready images. Simply upload your screenshot and we'll do the rest.

Acethinker Screen Grabber - Acethinker Screen Grabber is an amazing screen recording application that allows the users to record the computer screen along with its audio and high-quality videos.