SwitchResX - SwitchResX is a tool designed to manage resolutions of all your monitors and HDTVs.
W3C Mobile Checker - Make websites work better on mobile devices
EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.
Webflow CMS - Build professional dynamic websites without any code
Resolutionator - Resolutionator makes it simple to use any of your display's available resolutions.
Visual Stories - No-code Web Stories builder, blogging and content marketing platform.