1. s-utils
    Utilities by Sven Van Caekenberghe
  2. s-xml
    S-XML is a simple basic XML parser with both a function and (S)SAX like event interface as well as a DOM interface with LXML, SXML and an XML-ELEMENT struct DOM representation
  3. s-xml-rpc
    s-xml-rpc (https://common-lisp.net/project/s-xml-rpc) is an implementation of the XML-RPC protocol in Common Lisp for both client
  4. Sacla
    A partial metacircular Common Lisp implementation (Common Lisp written in portable Common Lisp) by Yuji Minejima
  5. safe-queue
    Thread-safe queues and mailboxes
  6. SAFER
    SAFER (Secure And Fast Encryption Routine) is a block cipher that was first published in 1993, followed by later variants
  7. Saluto
    Saluto is a submodule for RESTAS web-framework, which allow web-site users to be authorized with OAuth 2.0 protocol
  8. Salza
    If you're writing new code, you probably want to check out Salza2, which is a from-scratch reimplementation, and is much faster and simpler (and maintained).
  9. salza-png
    salza-png is considered obsolete by the author in favor of ZPNG.
  10. Salza2
    Salza2 is a native Common Lisp compression library for creating data in the DEFLATE, ZLIB, or GZIP compression formats