691. cl-sipc
     Unix domain socket message passing for IPC in Common Lisp
692. cl-skip-list
     cl-skip-lisp is a lock-free skip list implementation that works with SBCL 1.0.42 and above
693. cl-slice
     This library was unmaintained for several years
694. cl-slug
     cl-slug is a small library to make slugs, mainly for URIs, from english and beyond
695. cl-smoke
     cl-smoke is a SMOKE-based wrapper for the Qt and KDE GUI frameworks
696. CL-SMTP
     CL-SMTP is an SMTP (RFC 5321) client
697. cl-smugmug
     cl-smugmug is a Common Lisp interface to the SmugMug web API
698. CL-SOAP
     CL-SOAP is a open-source (LLGPL) project hosted at https://common-lisp.net/project/cl-soap/ (broken links on this page)
699. cl-soil
     Common Lisp wrapper around the SOIL library
700. CL-Sokoban
     CL-Sokoban implements the classic game Sokoban

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