XnView browser window:
It is easy to access image properties, EXIF information and the histogram of an image. Images can be grouped in categories as well.
Although XnView is not billed as an image editor, some basic editing is possible, such as cropping, resizing, rotating, etc. These features make for good all around image organization and control without an overload of editing capabilities. XnView does what it is designed to do effectively and efficiently. It would be a valuable addition to any suite of image management tools.