CThruView Transparent Image Viewer - CThruView is a free transparent image viewer that allows mouse clicks to go through the image.
Unity - The multiplatform game creation tools for everyone.
LayerX - An intuitive app to display transparent images on screen.
Godot Engine - Feature-packed 2D and 3D open source game engine.
PixelPerfect - Allows developers to put a semi-transparent image overlay over the top of the developed HTML and...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.