Ironclad is a cryptography library written entirely in Common Lisp. It includes support for several popular ciphers, digests, MACs and public key cryptography algorithms. For several implementations that support Gray streams, support is included for convenient stream wrappers.

CL-HEAP provides various implementations of heap data structures (a binary heap and a Fibonacci heap) as well as an efficient priority queue.

This package provides a JSON-RPC 2.0 server/client for Common Lisp.

This is a library for representing and mapping colours between their various spaces.

This is a Common Lisp library that converts floating point values to IEEE 754 binary representation.

This is a minimalistic parser of command line options. The main advantage of the library is the ability to concisely define command line options once and then use this definition for parsing and extraction of command line arguments, as well as printing description of command line options (you get --help for free). This way you don't need to repeat yourself. Also, unix-opts doesn't depend on anything and precisely controls the behavior of the parser via Common Lisp restarts.

Funds provides portable, purely functional data structures in Common Lisp. It includes tree based implementations for Array, Hash, Queue, Stack, and Heap.

SQL generator for Common Lisp.

This Common Lisp library provides function to make QR codes and to save them as PNG files.

cl-tar is a Common Lisp library providing a high-level interface for interacting with tar archives.

This package provides CFFI bindings for the stb_vorbis audio library to Common Lisp.

VAS-STRING-METRICS provides the Jaro, Jaro-Winkler, Soerensen-Dice, Levenshtein, and normalized Levenshtein string distance/similarity metrics algorithms.

This is an optimized Common Lisp library of Bob Jenkins' ISAAC-32 and ISAAC-64 algorithms, which are fast cryptographic random number generators: Indirection, Shift, Accumulate, Add, and Count.

This is a library to provide cross-platform access to gamepads, joysticks, and other such HID devices.

This library exports three symbols: with-raw-io, read-char, and read-line, to provide raw POSIX I/O in Common Lisp.

This package provides a BNF parser in Common Lisp.

This package provides audio input and output functions to Common Lisp using bindings to the portaudio library.

This library allows you to define custom indentation hints for your macros if the one recognised by SLIME automatically produces unwanted results.

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 library enable rapid file search, inspection and manipulation straight from the REPL. It aims at replacing Unix tools such as find or du. It also offers a replacement to the pathname Common Lisp API. Slot writers which commit changes to disk, e.g. permissions, modification time, etc.

MT19937 is a portable Mersenne Twister pseudo-random number generator for Common Lisp.

cl-inotify uses cl-cffi to provide a Common Lisp interface to the Linux inotify API.

The main purpose of this n+2nd reimplementation of quasiquote is enable matching of quasiquoted patterns, using Optima or Trivia.

This package provides a stream based JSON parser/writer, well suited as building block for higher level libraries.