Netbook and RAW viewer
Hmmm, I haven't loaded anything new onto my netbook since 2010. As I recall, I created a CD image of the program I wanted (Canon DPP) onto a usb stick. I also installed daemon tools which treated the usb stick as a virtual drive.
As for freeware, I have used a couple but they render the images oddly compared to the OEM sotftwares.