21. AccelerationNet
    AccelerationNet is a company that has released open source common lisp libraries
22. access
    Access is a library to ease getting and setting values in nested dictionary-like objects by providing a unified interface to hash-tables, clos-objects, plists and alists
23. acclaim
    Acclaim is a Presentation Graphics Application, which takes an input file of sexps describing each slide and renders them using CLX
24. Acclimation
    This project is meant to provide tools for internationalizing Common
25. accumulators
    Accumulators are libraries that help aggregate values by building lists, strings, or other data structures out of the pieces
26. ACL
    ACL refers to Allegro Common Lisp from Franz, Inc., a non-free Common Lisp implementation
27. ACL-COMPAT
    ACL-COMPAT is a free set of compatibility layers for parts of Franz's ACL system programming API for several Common Lisp implementations
28. ACL2
    ACL2 (A Computational Logic for Applicative Common Lisp) is a theorem prover for industrial Applications
29. act-r
    ACT-R is a cognitive architecture: a theory about how human cognition works
30. actors
    Actors is an actors package for LispWorks

CLiki the common lisp wiki