Peter Seibel’s “Practical Common lisp” (Online at http://www.gigamonkeys.com/book/) (Strongly recommended)
Paul Graham’s “ANSI Common Lisp”
http://p-cos.net/lisp/guide.html
David S. Touretzky’s “Common Lisp: A Gentle Introduction to Symbolic Computation”
(Online at http://www.cs.cmu.edu/~dst/LispBook/)
Paul Graham’s “On Lisp” (advanced level) (http://www.paulgraham.com/onlisp.html)
GNU CLISP (http://clisp.cons.org/) downloadable from http://sourceforge.net/project/showfiles.php?group_id=1355
Lisp in a box : http://common-lisp.net/project/lispbox/
This tool combines lisp interpreters together with emacs for lisp programming. Compatible with both Windows and Linux.
Emacs / Xemacs + slime + any lisp interpreter
Please check the following page for the configuration of CLISP + SLIME + XEmacs:
http://www.public.asu.edu/~ltang9/Lisp/xemcas-slime.htm
http://www.lib.uchicago.edu/keith/tcl-course/emacs-tutorial.html (I checked most commands and found it’s applicable to XEmacs as well)
http://www.cliki.net/Editing%20Lisp%20Code%20with%20Emacs
http://www.unixuser.org/~euske/vnc2swf/slime.html ( A very simple video to show the basic operations of slime).
http://bc.tech.coop/blog/050728.html (Way too complicated to use slime. I don’t think typical users will need this).
Newsgroup: comp.lang.lisp can be accessed using news.asu.edu or Google groups, or several other sites allow posting to and receiving emails from this news group.
Lisp
Wiki: www.cliki.net
Lisp hyperspec: http://www.lispworks.com/documentation/HyperSpec/Front/Contents.htm