PixelPerfect is described as '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 Firebug' and is an app in the Web Browsers category. There are eight alternatives to PixelPerfect for Mac, Windows, Linux, the Web and SIMBL. The best alternative is Afloat, which is both free and Open Source. Other great apps like PixelPerfect are Overlay2 (Paid), LayerX (Free, Open Source), Image Overlay Utility (Paid) and CThruView Transparent Image Viewer (Free, Open Source).
- CThruView is a free transparent image viewer that allows mouse clicks to go through the image. View 9 alternatives to CThruView Transparent Image Viewer
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