CL-HTTP has been used in several applications. ELM-ART is a tutoring system written in Common Lisp using CL-HTTP. It was later commercialized as NetCoach. InterBook is an early adaptive electronic text book, also written on top of CL-HTTP. Cl-HTTP has been used very early as a tool to create web interfaces for applications.
Most prominent, CL-HTTP was used during the era of President Clinton as the web server for the White House Publications web site. It distributed the daily press releases and official publications of the Clinton Administration.
CL-HTTP is an example of a non-trivial Lisp application.
^A Common LISP Hypermedia Server, John C. Mallery, Proceedings of The First International Conference on The World-Wide Web, Geneva: CERN, May 25, 1994.
^ELM-ART: An intelligent tutoring system on world wide web Peter Brusilovsky, Elmar Schwarz und Gerhard Weber, Lecture Notes in Computer Science, 1996, Volume 1086/1996, 261-269, doi:10.1007/3-540-61327-7_123, Springer
^Developing Adaptive Internet Based Courses with the Authoring System NetCoach, Gerhard Weber, Hans-Christian Kuhl und Stephan Weibelzahl, Lecture Notes in Computer Science, 2002, Volume 2266/2002
^A Tool for Developing Adaptive Electronic Textbooks on WWW., Brusilovsky, Peter; Schwarz, Elmar; Weber, Gerhard, WebNet 96 Conference Proceedings (San Francisco, CA, October 15–19, 1996)
^Patching onto the Web: Common LISP hypermedia for the intranet, Byron Davies, Victoria Bryan Davies, Communications of the ACM, Volume 40 Issue 5, May 1997
^An HTTP Interface to Common Music, Heinrich Taube, Tobias Kunze, International Computer Music Conference, 1997
^An HTML Interface for Classic, Christopher A. Welty, In Proc. of the 1996 Description Logic Workshop (DL’96), number WS-96-05 in AAAI Technical Report. AAAI Press
^An interactive DSP tutorial on the Web, Rahkila, M.; Karjalainen, M.; Lab. of Acoust. & Audio Signal Process., Helsinki Univ. of Technol., Espoo, IEEE International Conference on Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 PDF
^CL-HTTP was fielded in 1994 to serve the White House Publications System 
^How Lisp Systems Look Different, Dozsa, A.; Gtrba, T.; Marinescu, R.; Politeh. Univ. of Timisoara, Timisoara, 12th European Conference on Software Maintenance and Reengineering, 2008. CSMR 2008.