This is a Common Lisp library for reading and printing MIME content. It supports automatic conversion between 7-bit, quoted-printable and base64 encodings.

SEEDABLE-RNG provides a convenient means of generating random numbers that are seedable with deterministic results across hardware and Common Lisp implementations.

This is a Common Lisp library for creating PNG images.

zsort is a collection of portable sorting algorithms. Common Lisp provides the sort and stable-sort functions but these can have different algorithms implemented according to each implementation. Also, the standard sorting functions might not be the best for a certain situations. This library aims to provide developers with more options.

This is a keymap facility for Common Lisp inspired by Emacsy (keymap.scm) which is inspired by Emacs.

• Support prefix keys to other keymaps. For instance, if you prefix my-mode-map with C-c, then all bindings for my-mode will be accessible after pressing C-c.

• List all bindings matching a given prefix. (Also known as which-key in Emacs.)

• List the bindings associated to a command.

• Support multiple inheritance.

• Support keycode.

• Validate keyspec at compile time.

• define-key can set multiple bindings in a single call.

• Support multiple scheme to make it easy to switch between, say, Emacs-style and VI-style bindings. This orthogonality to keymaps composes better than having multiple keymaps: changing scheme applies to the entire program, which is easier than looping through all keymaps to change them.

• Translate keyspecs as a fallback. For instance if shift-a is not bound, check A.

• Behaviour can be customized with global parameters such as *print-shortcut*.

• The compose function can merge multiple keymaps together.

• Support multiple arguments when that makes sense (e.g. multiple keymaps for lookup-key).

• Key remapping à-la Emacs.

• Typed keymaps, i.e. keymaps where bound values can only be of a given type. This is convenient to catch typos, for instance when binding 'FOO instead of #'FOO.

Xmls is a self-contained, easily embedded parser that recognizes a useful subset of the XML spec. It provides a simple mapping from XML to Lisp structures or s-expressions and back.

This library tries to provide a way to detect what kind of type the given predicate is trying to check. This is different from inferring the return type of a function.

simple-optimization is a Common Lisp library providing a function to solve unconstrained optimization problems numerically using either the gradient descent or a quasi-Newton method.

CL-FTP is a library which provides FTP client functionality to a Common Lisp program. CL-FTP uses the USOCKET package for network sockets and the SPLIT-SEQUENCE package for some parsing needs.

Babel is a charset encoding and decoding library, not unlike GNU libiconv, but completely written in Common Lisp.

Eager Future2 is a Common Lisp library that provides composable concurrency primitives that unify parallel and lazy evaluation, are integrated with the Common Lisp condition system, and have automatic resource management.

This package provides an extensible implementation of defclass that can accurately control the expansion according to the metaclass and automatically detect the suitable metaclass by analyzing the defclass form.

It's very basic implementation of channels and queue for Common Lisp.

Simple library to create temporary directories.

The Common Foreign Function Interface (CFFI) purports to be a portable foreign function interface for Common Lisp. The CFFI library is composed of a Lisp-implementation-specific backend in the CFFI-SYS package, and a portable frontend in the CFFI package.

This package provides a client for SMTP.

This is a string/octets parser library for Common Lisp with speed and readability in mind. Unlike other libraries, the code is not a pattern-matching-like, but a char-by-char procedural parser.

This is a baseline JPEG codec written in Common Lisp. It can be used for reading and writing JPEG image files.

This is a packrat parser for Common Lisp. In addition to regular Packrat / Parsing Grammar / TDPL features ESRAP supports:

• dynamic redefinition of nonterminals

• inline grammars

• semantic predicates

• introspective facilities (describing grammars, tracing, setting breaks)

• left-recursive grammars

• functions as terminals

• accurate, customizable parse error reports

FSet is a functional set-theoretic collections library for Common Lisp. Functional means that all update operations return a new collection rather than modifying an existing one in place. Set-theoretic means that collections may be nested arbitrarily with no additional programmer effort; for instance, sets may contain sets, maps may be keyed by sets, etc.

This is an extension library to pathname-utils, to allow dealing with common problems with filesystems, such as listing files, probing file types, determining default directories, etc.

THE-COST-OF-NOTHING is a library for measuring the run time of Common Lisp code. It provides macros and functions for accurate benchmarking and lightweight monitoring. Furthermore, it provides predefined benchmarks to determine the cost of certain actions on a given platform and implementation.

This is a Common Lisp library providing a set of macros for generating lexical analyzers automatically. The lexers generated using cl-lex can be used with cl-yacc.

This is a bare-bones Permuted Congruential Generator implementation in pure Common Lisp.