New: Draw.io (Jun 2, 2022), Platform 22.0b1 (Jun 10, 2022)
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gqview (http://gqview.sourceforge.net/) is a very nice image viewer. Recently, someone startet a win32 port (http://gqview-win.sourceforge.net/). It uses GTK, but if GIMP can run, this can too.
Would be great to see!