1. rclg
    An R (statistics programming language) FFI for Common Lisp
  2. RDF
    The Resource Description Framework (RDF) is a framework for representing information in the Web. Resource Description Framework (RDF): Concepts and Abstract Syntax
  3. RDNZL
    RDNZL (pronounced "Redunzl") enables Common Lisp applications to interact with dot-NET libraries
  4. rdp
    com.informatimago.rdp is a simple Recursive Descent parser generator
  5. re
    The re package is a small, portable, lightweight, and quick, regular expression library for Common Lisp
  6. Reactive
    CL-REACTIVE - Reactive programming at the variable/function level for Common Lisp qooxlisp - Qooxlisp is a reactive rich web applications framework based on Qooxdoo built on the cells library with which its author built an online algebra learning system and sees continuation in MatrixJS / cljs
  7. read-csv
    Read-csv is a library for reading csv (comma-separated-values) files
  8. READ-DELIMITED
    READ-DELIMITED (proposed by Jochen Schmidt) is a member of the Common Lisp Utilities family of programs, designed by community consensus
  9. read-macros
    read-macros is a convenience library of useful read macros for CL
  10. readable
    readable adds additional abbreviations in the sexp reader; supports infix, optional standard function call notation, optional indentation