Plump is a parser for HTML/XML-like documents, focusing on being lenient towards invalid markup. It can handle things like invalid attributes, bad closing tag order, unencoded entities, inexistent tag types, self-closing tags and so on. It parses documents to a class representation and offers a small set of DOM functions to manipulate it. It can be extended to parse to your own classes.

Optima is a fast pattern matching library which uses optimizing techniques widely used in the functional programming world.

Common Lisp already has major 2 namespaces, function namespace and value namespace (or variable namespace), but there are actually more — e.g., class namespace. This library offers macros to deal with symbols from any namespace.

This package provides support routines for the claw Common Lisp package.

BOOST-LEXER is a tokenizer for Common Lisp that makes heavy use of BOOST-RE.

This Common Lisp package offers functions for parsing and formatting decimal numbers. The package's main interface are the functions parse-decimal-number and format-decimal-number. The former is for parsing strings for decimal numbers and the latter for pretty-printing them as strings.

GARBAGE-POOLS is Common Lisp re-implementation of the APR Pools for resource management.

A simple Common-Lisp interface to the underlying operating system. It's independent of the implementation and operating system.

This library provides a simple multithreading worker mechanism.

Bobbin is a simple word-wrapping library for strings in Common Lisp. It aims to be simple, work nicely for the majority of cases, and degrade gracefully for edge cases. It is not particularly concerned with speed — if you need very high-performance word wrapping, Bobbin is not for you.

Scrape on-line documentation out of a running Lisp image.

CLAWK is an AWK implementation embedded into Common Lisp.

The 3d-math library implements types, operators, and algorithms commonly used in math for 2D and 3D graphics. It supersedes and combines the prior libraries 3d-vectors, 3d-matrices, 3d-quaternions, and 3d-transforms. The new API is largely but not entirely backwards compatible, and adds new functionality.

This system implements binding threading macros -- a kind of threading macros with different semantics than classical, Clojure core threading macros or their extension, swiss-arrows. Two Common Lisp implementations of those are arrows and arrow-macros.

This system is a fork of arrows with changes in semantics that make it impossible to merge back upstream.

3bz is an implementation of Deflate decompression (RFC 1951) optionally with zlib (RFC 1950) or gzip (RFC 1952) wrappers, with support for reading from foreign pointers (for use with mmap and similar, etc), and from CL octet vectors and streams.

CL-DEBUG provides a unified way to enable or disable debug-specific code. Debugging code can be enabled or disabled relative to program features denoted by either a symbol or a keyword.

This is a Common Lisp library providing RFC 3986 percent-encoding.

Pileup is a portable, performant, and thread-safe binary heap for Common Lisp.

This library provides a modern project skeleton generator. In contract with other generators, CL-Project generates one package per file and encourages unit testing by generating a system for unit testing, so you can begin writing unit tests as soon as the project is generated.

Binary-types is a Common Lisp package for reading and writing binary files. Binary-types provides macros that are used to declare the mapping between Lisp objects and some binary (i.e. octet-based) representation.

Tripod is a Common Lisp web server aiming to ease plain text, HTML, and Gopher website hosting.

This is a Common Lisp library that publishes D-Bus objects as well as send and notify other objects connected to a bus.

BOOST-JSON is a simple JSON parsing library for Common Lisp.

The cl-data-lens library provides a language for expressing data manipulations as the composition of more primitive operations.