Whimsical Wireframes - Lightning fast wireframing with real-time collaboration.
CThruView Transparent Image Viewer - CThruView is a free transparent image viewer that allows mouse clicks to go through the image.
Figma Map Maker - Figma plugin to generate map, supporting Google Maps, Mapbox
LayerX - An intuitive app to display transparent images on screen.
Invision - Prototyping and collaboration for design teams
Osiva - Osiva" is an acronym that stands for "Overly Simple Image Viewing