FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor. It supports all major graphic formats (BMP, JPEG, JPEG 2000, animated GIF, PNG, PCX, TIFF, WMF, ICO and TGA) and popular digital camera RAW formats (CRW, CR2, NEF, PEF, RAF, MRW, ORF, SRF and DNG).
No Adware No Spyware
This utility does it all!!
http://www.faststone.org/FSViewerDetail.htm