1. dso-csv
    A very simple parser for the CSV (comma-separated values) file format
  2. dso-lex
    Allows lexers to be defined using regular expressions a la cl-ppcre
  3. dso-parse
    This is a simple PEG (parsing-expression grammar) parser-generator, aimed mostly at parsing text but capable of parsing other structures as well
  4. dso-util
    A small set of utilities, functions and macros, by David Owen
  5. DTP Prover
    DTP (Don's Theorem Prover) is "a sound and complete inference engine
  6. Duologue
    High-level user interaction library for Common Lisp
  7. Dwight Holman
    Dwight Holman is a Person attending California State University, Chico
  8. dwim.hu
    dwim dot hu is the homepage of four Hungarian lispers who started a lisp company, hosting all their opensource projects
  9. Dynamic ADTs
    Dynamic ADTs are abstract data types with a framework for observation and adaptation
  10. dynamic-classes
    Lets you specify CLOS classes (e.g., as arguments to make-instance) using parameters at run-time, letting you use mixins more conveniently