1. cl-travis
    cl-travis allows you to test your Common Lisp projects across a number of implementations on the continuous integration service Travis, which lacks built-in support for the language
  2. cl-treemaps
    cl-treemaps is a lightweight and fast implementation of binary trees
  3. cl-tumblr
    CL-TUMBLR provides a simple interface to Tumblr's API
  4. cl-tuples
    cl-tuples is a library for writing optimised vector math
  5. cl-twitter
    This is an interface to the twitter api
  6. cl-typed
    ML-like syntax for ftypes with library-side type-checking
  7. cl-typesetting
    cl-typesetting is a Common Lisp typesetting application about on the level of TeX
  8. cl-uglify-js
    A JavaScript compressor (minifier)
  9. cl-ulid
    ULID implementation in Common Lisp
  10. 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