1. Smart cards
    Free software related to integrated chip cards (ICC) with contacts (ISO/IEC 7816) or contactless (ISO/IEC 14443)
  2. smart-buffer
    An output buffer that can spill to disk
  3. sml
    S-expression-based markup language
  4. smta
    smta is a simple SMTP email server
  5. smtp4cl
    SMTP4CL is a SMTP client library to send messages to an MTA (Mail Transport Agent)
  6. snakes
    Python style generators for Common Lisp
  7. SNARK
    SNARK (SRI's New Automated Reasoning Kit) is described as "an automated theorem-proving program" being developed in Common Lisp
  8. SNePS
    SNePS (Semantic Network Processing System) is an AI system for building, using and retrieving information from propositional semantic networks
  9. SNMP
    Simple Network Management Protocol
  10. Snooze
    Snooze is an URL router for Common Lisp designed around REST web services