I was lastly looking for an image viewer for placing images on Windows desktop.

The frameless image viewer is the best that I found.

However I noticed that the option alpha to enable transparency, works is png but not in annimated gif.

Also, another option would be nice to have is a delay before starting to show the picture. This is an addition to the duration option that already exit.

I can eventually contribute. This tool is really good. I want to use it for the purpose of creating presentation demos.