I used to use CDEx, but there seems to be a bug in the current release which means it's unstable (it reports "Failed to load the wnaspi32.dll driver! Use the “Native NT SCSI library” driver option instead?" on startup and then crashes out as soon as you try to use it).
Can anyone recommend any good freeware (i.e. not trial or function limited versions) applications that can rip to MP3 and don't contain any spyware?