html-entities
HTML-ENTITIES is a library for encoding and decoding special characters in HTML (or SGML or XML, whatever). See the home page for documentation and downloads.

HTML-ENTITIES is no longer hosted on Google Code, and no alternate source has surfaced. It no longer builds reliably and has been removed from Quicklisp.

As a replacement, Plump has DECODE-ENTITIES and ENCODE-ENTITIES which work in a nearly identical manner.