1. Serapeum
    Serapeum is a utility library, which can be used as a supplement to Alexandria
  2. serialization
    Libraries to translate data structures to/from a format which can be stored/retrieved
  3. Series
    A library providing data structure that combines aspects of sequences, (lazy) streams and loops, using a technique known as “fusion” or “deforestation”
  4. session-token
    session-token is a simple session token generator based on Session::Token
  5. SHA1
    Secure Hash Algorithm 1 (SHA1) is defined in RFC 3174, and therefore more-or-less counts as a protocol
  6. sha3
    This library is an implementation of the Secure Hash Algorithm 3 (SHA-3), also known as Keccak
  7. shallow-copy-array
    SHALLOW-COPY-ARRAY is a member of the Common Lisp Utilities
  8. shared-preferences
    shared-preferences notably allows flexible specification of package-local preferences
  9. sharp-bq
    A construct borrowed from the Lisp Machine, e.g
  10. sharplispers
    A group of Common Lisp hackers who occasionally maintain otherwise abandoned or quasi-abandoned Common Lisp software packages