Overlay - Overlay transforms Figma and Sketch designs into reusable React, Vue.js components
PiP for Mac - Always on top window preview similar to the popular windows only OnTopReplica
LayerX - An intuitive app to display transparent images on screen.
Pennywise - Cross-platform application to open any website or media in a floating window
CThruView Transparent Image Viewer - CThruView is a free transparent image viewer that allows mouse clicks to go through the image.
Afloat - Create beautiful invoices in 3 clicks, without mistakes