A free and portable Common Lisp Webserver.
Portable AllegroServe is a variant of AllegroServe(tm) with an explicit emphasis on portability between Lispsystems and Operating Systems. You can find the original AllegroServe at https://github.com/franzinc/aserve
The best way to install Portable AllegroServe is through Quicklisp (http://quicklisp.org/). (The best way to install any Lisp library is through Quicklisp.)
Lisplets are Java Servlets that forward their requests, and gather their response headers, using s-expressions over sockets. They enable easy integration of Common Lisp or Scheme into a Java-based web environment.
The Lavlet HTTP server and Lisp Server Pages engine is a complete ANSI Common Lisp web server and dynamic pages engine for Lisp modeled after JSP/Servlet/Tomcat and ASP/IIS.