Common Lisp Quick Reference
I found this Common Lisp Quick Reference the other day from r/lisp, and I think it's fantastic. It's a comprehensive, libre booklet of the symbols defined by the Common Lisp ANSI standard. Very slick!
The main version is meant to be printed out and nested with a vertical fold, and it works quite well. If I ever get a chance to use Common Lisp at work (a man can dream), probably at a location without Internet access, this could come in handy. So I printed out one for myself,