James Anderson's collection of Common Lisp modules for XML includes XQuery support.

An open source implementation of the Common Lisp Interface Manager, a portable and standardized library for constructing user interfaces.

Wiki engine for Common Lisp. Runs alone or on Apache + mod_lisp. [Open source, Lisp Lesser General Public License]

A library to embed Common Lisp and special template tags into normal text files. Can be used for dynamically generated HTML pages. [Open source, Lisp Lesser General Public Licence]

A project to package and easily distribute Lisp software. It is loosely modelled after the ideas behind CPAN, for Perl.

Portable library for Common Lisp, can be used to fill templates with arbitrary (string) values at runtime; loosely modeled after Perl module HTML::Template and compatible with a subset of its syntax. [Open source, BSD-style license]

Interactive Network Editor and Graphical Database.

GDL Application Development System, dynamic Knowledge Base Language and Development Environment; Generative Web Language (GWL), an integrated web-based user interface platform, for rapid development and deployment of dynamic webserver-based apps. ANSI...

An interface between Common Lisp and X Window.

mod_lisp is an Apache plugin which lets apache send requests to a lisp process to generate dynamic content. Think of it as java server pages for lisp. cl-pdf is a library to create files in Portable Document Format from Common Lisp.