Xee is a great image viewer.

One small trouble:
When I order the photos by date (timestamp) and then start viewing them, the pictures don't show in date order but in name order.
I set "date modified" of my photo files to the EXIF time stamp (jhead helps wth it) and then want to watch the pictures in chronological order (mixed from several cameras, so names don't reflect chronlogical order), but it doesn't work in Xee.