W3C Mobile Checker - Make websites work better on mobile devices
Screen Resolution Manager - Screen Resolution Manager is one of the robust and streamlined desktop applications that come with an easy way to adjust your screen resolution.
Webflow CMS - Build professional dynamic websites without any code
HRC – Hotkey Resolution Changer - If you are looking for a sumptuous desktop application that will overcome every bit of your need to adjust the brightness, resolution, and color contrast of your screen, then Hotkey Resolution Changer can be a smart option for you.
Visual Stories - No-code Web Stories builder, blogging and content marketing platform.
EasyRes - EasyRes is a fast screen resolution switcher for Mac OS X with live animated previews.