Like Zinf, I really don't have a lot to say about CDex. I use it simply because it has a simple interface, supports OGG/Vorbis format, and is open source. The best description can be found at the CDex website:
CDex is a tool to do all sorts of things audio related. Mainly focused on ripping
and converting, things like turning your home Compact Disc collection into an mp3
collection on your hard drive become extremely easy. With built in support for
many encoders you wont find any shortage of options for your media files. Below
is a more in-depth explanation of CDex features.
CDex Feature List:
Best of all CDex is entirely free! You will never have to pay to use the software or register in any way. Moreover, CDex is entirely open source!