Scrnshts
Scrnshts is a great tool that provides a variety of App Store Screenshots, to inspire designers to market their next project!
Related Tools

Collect UI
Collect UI is a platform for your daily inspiration collected from daily UI and beyond. Based on Dribbble shots, hand picked.

Email Love
Email inspiration, resources and discovery. Email Love lets you browse Email inspiration, find Email templates and discover great newsletters.

Httpster
Httpster is an inspiration resource showcasing totally rocking websites made by people from all over the world.

iOS Icon Gallery
iOS Icon Gallery is a collection of hundreds of iOS App icon designs. It’s a great tool for inspiration on your next App design project.