Lisp
CMUCL: a high-performance, free Common Lisp implementation
Association of Lisp Users
An Introduction and Tutorial for Common Lisp
LISP prehistory - Summer 1956 through Summer 1958
Common Lisp: A Gentle Introduction to Symbolic Computation
Practical Common Lisp
CLISP
CLiki: The Common Lisp Wiki
The Common Lisp Cookbook
Planet Lisp