IOlib is to be a better and more modern I/O library than the standard Common Lisp library. It contains a socket library, a DNS resolver, an I/O multiplexer(which supports select(2), epoll(4) and kqueue(2)), a pathname library and file-system utilities.

Napa-FFT3 provides Discrete Fourier Transform (DFT) routines, but also buildings blocks to express common operations that involve DFTs: filtering, convolutions, etc.

Library to fuzzily parse time and date strings into a universal-time timestamp.

40ants-plantuml provides a wrapper around the PlantUML jar library.

This a Common Lisp library to convert geographic coordinates between latitude/longitude and Maidenhead locator system.

This is a Common Lisp library providing logging faciltiy similar to CL-LOG and LOG4CL.

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

This software provides an interface by which Common Lisp programs can access lexicographic data from WordNet.

This is a Common lisp library to unify access to the most common dictionary-like data structures.

CXML does an excellent job at parsing XML elements, but what do you do when you have a XML file that's larger than you want to fit in memory, and you want to extract some information from it? Writing code to deal with SAX events, or even using Klacks, quickly becomes tedious. cl-xmlspam (for XML Stream PAttern Matcher) is designed to make it easy to write code that mirrors the structure of the XML that it's parsing. It also makes it easy to shift paradigms when necessary - the usual Lisp control constructs can be used interchangeably with pattern matching, and the full power of CXML is available when necessary.

Parse INI formatted files into a Common Lisp list structure.

cl-all is a library and script for evaluating Common Lisp expressions in multiple implementations.

Implementation of a set-like data structure with constant time addition, removal, and random selection.

NJSON aims to make it convenient for one to decode, encode, and process JSON data, in the minimum keystrokes/minutes possible.

NJSON is parser-independent, with existing Common Lisp JSON parsers being loadable as additional system. jzon is included by default, though. Conveniences that NJSON provides are:

• encode and decode as single entry points for JSON reading and writing, be it from streams/string/files, or from those.

• jget, jcopy, jkeys, and their aliases to manipulate the decoded objects' properties without the need to worry about the low-level details of how these values are decoded.

• jif, jwhen, jor, jand, and other macros mimicking Lisp ones, while using truth values of JSON-decoded data.

• jbind and jmatch macros to destructure and validate parsed JSON.

• njson/aliases package to nickname to j for all the forms conveniently accessible as j:get, j:copy, j:if etc.

This package contains a Gemini client library for Common Lisp. A subsystem offers an experimental GUI Gemini client.

This package provides a Common Lisp bindings to glfw, an OpenGL application development library.

This is a library for access to atomic operation primitives such as compare-and-swap. It aims to be a rather thin layer over what the implementations offer.

This package provides CFFI bindings and interface to Allegro 5 game developing library for Common Lisp.

Moira is a library for monitoring and, if necessary, restarting long-running threads. In principle, it is like an in-Lisp process supervisor.

This package makes it possible to name classes by lists of symbols instead of symbols.

PARSE is a simple token parsing library for Common Lisp.

This package provides an implementation of the hash-set data structure. It has constant time lookup, insertion and deletion.

This library is a redefinition of the standard Common Lisp package that includes a number of renames and shadows.

This Common Lisp library converts strings, symbols and keywords between any of the following typographical cases: PascalCase, camelCase, snake_case, kebab-case (lisp-case).