A simple, portable Common Lisp implementation of the double linked list (a very common data structure). It is small, BSD licensed and requires no external dependencies.

Homepage: at pulsar-zone.net (dead link)

Since the link is dead, and nobody has probably seen the code in years, this library is not tagged. Which means nothing references it anymore. CLiki guidelines do not suggest it should be deleted solely on these grounds. But it's better to reference such orphaned articles somewhere so that they are not accessible exclusively through search. — akater