PixelPerfect

Allows developers to put a semi-transparent image overlay over the top of the developed HTML and perform per pixel comparison between them. Works with DevTools and...

Free Mac Windows Linux Microsoft Edge Internet Explorer ... Chrome Safari Opera Firefox

Overlay2

Overlay2 is like digital tracing paper for your computer. It opens a semi-transparent floating image over video capture or editing software, or 3D modelling software, so...

Commercial Mac Windows

CThruView Transparent Image Viewer

CThruView is a free transparent image viewer that allows mouse clicks to go through the image. This makes your image see through and click through, so use it as tracing...

• Discontinued The project is no longer developed. Last version, 1.0, released in September 2010, can be still downloaded from the official website.

Free Open Source Mac Windows Linux Web

LayerX

An intuitive app to display transparent images on screen.

Free Open Source Mac

Uberlayer

With the Uberlayer app you can put floating images on top of your computer screen. Maybe you want to proof a design to the pixel, watermark a presentation or always have...

Commercial $ $ $ Mac

Overlay

A frame that allows you to have an image or even PDF displayed semi-transparently in front of everything. It enables you to copy, trace, or compare designs, images, and...

Commercial $ $ $ Mac

GluePrint

Turn any mockup into a floating guide, and visually align pixels with ease. Use GluePrint to implement your interfaces pixel perfect. Simply open a mockup and lock it...

Commercial $ $ $ Mac