A C library for matching regular expressions with Perl 5 syntax and semantics. PCRE has its own native API, as well as a set of wrapper functions that correspond to the POSIX regular expression API.

Lightweight, robust, and almost fully POSIX compliant regexp matching library which supports approximate matches. [GNU GPL].

A C regular expression library, developed for the programming language Ruby. Provides software-download, description, links and references.

A modified version of Henry Spencer's regular expression library (Autoconf, Automake and Libtool scripts have been added and a few file names have been changed). Also related links.

Provides compile PCRE libraries for Windows developers, and source code to build with Visual C++.

A free component that enables the use of regular expression searching in a C++ program.

A C++ regex template library that allows regexes to be written as strings or as expression templates and to refer to themselves and other regexes recursively.

C++ template classes for declaring grammars directly in the code as set of compound classes. Includes regexp_parser class for parsing input upon regular expression definition provided in its constructor.

John Maddock, the author of RegEx++, explains how to use Regular Expressions in C/C++ programs.