Eitarow Fukamachi has put up an interesting service called Quickdocs. It's a search engine for the Quicklisp repository. There's no directions or explanation of exactly what a search provides so it's a bit of an adventure game but appears to be quite useful. If I type in “iron,” I get a result that says “ironclad” the excellent crypto library from Nathan Froyd. When I click on “ironclad” it gives me the README for the project and offers to download it for me.
From what I can tell, the search is a regular expression search on the project name so typing in “crypto” returns no results. This appears to be a handy resource and will doubtless get better. Worth a look if you are, as you should be, a Quicklisp user.