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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.

Aryson PDF Merge - PDF Merge software allows you to combine, join or merge multiple PDF files into One. Merge PST tool to merge PDF files into single Portable Document Format online for free.

Tweakr.io - The fastest way to get visual feedback 📌

Softdiv PDF Split and Merge - PDF software that allows you to easily split and merge PDF files in just a few steps.

Marvel - Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.