I've been interested in the World of Lisp lately.
Searching around I found a couple of common lisp implementations (CLISP, GNU LISP and SBCL).
What tools and implementations does /prog/ use?
Emacs has a special lisp mode, what's /prog/'s opinion on it?
>>4 Clojure offers nothing new to the table
Lies. At the very least, Clojure offers painless parallelism without locks. Parallel code in CL looks like imperative diarrhea full of locks, indistinguishable from Java. It's embarrassing.
I use SBCL and ClozureCL (not to be confused with Clojure) as my implementations of choice (I also use others as it's easy to install more).
Emacs+SLIME+Paredit+Redshank as the editor/environment in which I actually write/test/debug the code that I write.