Yuji “bmonkey” Minejima has released hyperspec-addon.el for emacs, which enhances the ubiquitous hyperspec.el by adding the ability to search the Common Lisp Hyperspec for chapter names, format control characters (my favorite), reader macro characters, loop keywords, MOP symbols, arguments (e.g., recursive-p) and concepts (e.g., lambda lists). [via Bill Clementson.]