Short answer: a replacement for the ripper part of Grip written in Common Lisp.
Future versions of RIP-L will be able to share encoding and ripping jobs across several machines in a local network.
RIP-L is in the public domain.
See the README in the distribution. It'll say something like this:
If necessary, set *OGG-ENCODER-PROGRAM* (default is "/usr/bin/oggenc") and *OGG-TAGGER-PROGRAM* (default is "/usr/bin/vorbiscomment") and *RIPPER-PROGRAM* (default is "/usr/bin/cdparanoia").