XnView is a program for viewing and converting your graphics files.
It supports more than 400 file formats (PNG, Jpeg, Targa, Alias, Softimage, Tdi, Gif, Unix bitmap, windows, Iff, Rgb, Sun Raster, Fits, Photo CD, Photoshop and more). 
It offers the possibility to apply filters (blur, average, emboss, ...) and effects (lens, waves, ...). 
Picture browser, Slide show, Thumbnail create and RAW/YUV import.

