“Web server written in Common Lisp”
Hunchentoot is a web server written in Common Lisp and at the same time a toolkit for building dynamic websites. As a stand-alone web server, Hunchentoot is capable of HTTP/1.1 chunking (both directions), persistent connections (keep-alive), and SSL.
Hunchentoot provides facilities like automatic session handling (with and without cookies), logging, customizable error handling, and easy access to GET and POST parameters sent by the client. It does not include functionality to programmatically generate HTML output. For this task you can use any library you like, e.g. (shameless self-plug) CL-WHO or HTML-TEMPLATE.
Hunchentoot talks with its front-end or with the client over TCP/IP sockets and optionally uses multiprocessing to handle several requests at the same time. Therefore, it cannot be implemented completely in portable Common Lisp. It currently works with LispWorks and all Lisps which are supported by the compatibility layers usocket (github) and Bordeaux Threads (github).