Gotta bump Kuadro! Hehehe...
I just started on a large gig that needs crap-loads of reference images open... When doing a clean re-install of Win last year, building new beast, I killed Kuadro in the process and kinda forgot about it... and was using Windows Photo Viewer.. again.. ever since... d'oh! Anyhoo, I was just now thinking: "wasn't there a great ref image app I used to have?..." and I thought I saw it here somewhere... Was pretty funny to see that I was the bastard that posted about Kuadro!
Now has Mac version too, for those of you who wanted
that.