DDS Converter 2 program
I love it because it's very easy to convert from DDS to other formats (and from other formats to DDS too)
Using this program you'll be able to open the .dds and see how it looks in jpg and other formats.
If I'm not mistaken, there's also a Photoshop plugin too that makes PS able to open .dds files without the need for conversion, but I still use DDS Converter.