Spf-Screen Polarization Filter

Hello Friends, Introducing Spf is an open source app which is easy to use and will add a semi-opaque layer to your screen to show low visible and highlighted elements in your presentation or any other design. Spf will help you when you are presenting work on a screen or projector that is not well showing like highlights or fine-details

Spf is a tiny, open source, Mac app that enables you to display a dark overlay on your screen so highlights actually show up!