SwitchResX - SwitchResX is a tool designed to manage resolutions of all your monitors and HDTVs.
Anima App - Design, get feedback, convert to code, publish, iterate.
EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
Resolutionator - Resolutionator makes it simple to use any of your display's available resolutions.
Marvel for Sketch - Sync, play and record prototypes in Sketch!