1. cl-ulid
    ULID implementation in Common Lisp
  2. cl-unicode
    CL-UNICODE provides Common Lisp implementations with knowledge about Unicode characters including their name, their general category, the scripts and blocks they belong to, their numerical value, and several other properties
  3. cl-unification
    Provides unification (as used in Prolog) over fairly arbitrary Common Lisp objects
  4. cl-unit-test
    cl-unit-test has been tested by itself with 100% test code coverage
  5. cl-unix-cybernetics
    UNIX system administration in Common Lisp
  6. cl-uri-templates
    cl-uri-templates is an implementation of URI-Templates that supports the full draft 03 URI Template standard
  7. cl-utilities
    A library of semi-standard utilities
  8. CL-V4L2
    cl-v4l2 is a CFFI interface to Video4Linux2
  9. cl-variates
    CL-Variates is a set of platform independent Common Lisp utilities for mucking with random number generation
  10. cl-vectors
    cl-vectors is a pure CL vector rasterization and manipulation system