NexusImage a simple but effective image viewer enables a comfortable sidebar thumbnails of the images in the folder permanently.
The program of any JPEG, bitmap, GIF, PNG, TIFF, ICO, WMF, EMF support. Although animated GIF images in GIF funds shows that it is only the first frame.
NexusImage does not need to be installed and it runs really well. Run the program and choose the folder you want to explore. You will find a list of thumbnails in the sidebar.
Although NexusImage very limited functions, it offers a different way to view the image, and it will not be able to suit your needs with no problem.