The best image display program I have found is IRFanView
. I prefer it to ACDSee and just about anything else. I like it because it has particularly good keyboard controls.
I haven't found a good image viewer for Linux yet though. Does anyone have a good pointer? Basically, what I want to be able to do is "next file in directory", "previous file in directory", full screen / window, 100% zoom, fit to screen zoom controls all via keyboard.