This question already has an answer here:
I need a simple image editor tool to draw a simple box/rectangle in an existing image, and probably write a simple text in it.
A similar but not the same question has been asked here before: Simple image editor?
The problem is that none of the solutions given can draw a simple box in an existing image. Pinta looks good, but this tool always crashes and doesn't help at all.
Others such as Shotwell, GThumb, Shutter don't even have a tool to draw a simple rectangle at all.
I'm looking for a very simple tool that can draw a box on existing image like this.
Please do not suggest GIMP, as I'm looking for a very simple tool, probably like Pinta, but not buggy and must be stable.