Found this years ago and have been using it to help me with various things. Like game map designs, accurate pinpoints on a page, templates for various applications, MS Excel, Word PowerPoint helper, window positioning, act as a custom Ruler.
You can also censor chat if you are recording in a game (though, some games have it blocked by their anti-cheat).
LayerX - An intuitive app to display transparent images on screen.
Overlay2 - Overlay2 is like digital tracing paper for your computer.
PixelPerfect - Allows developers to put a semi-transparent image overlay over the top of the developed HTML and...
Osiva - Osiva" is an acronym that stands for "Overly Simple Image Viewing
Thumbnail Maker 2020 - Thumbnail Maker 2020 app enables users to create thumbnails, channel art, and banners for their YouTube channel so they can gain more exposure.
UserTest.io - User testing made simple. High-quality, affordable user testing solutions from real users, here in the UK. Improve your usability!