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PNG Express Automated asset exporting and specs from PSDs
Animate.css Just-add-water CSS animations
Screenshotter The simplest way to organize and manage mobile screenshots.
Land Book Product landing pages gallery.
Really Good Emails A large collection of good product email design.
Peek by UserTesting Get a free, 5-minute video of someone using your site
WhatFont The easiest way to identify fonts on web pages.
UXArchive The iPhone App Archive
InVision Prototyping and collaboration for design teams
Red Pen Effing Fast Feedback