PCRE - Perl Compatible Regular Expressions
- http://www.pcre.org/
- 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.
TRE
- http://laurikari.net/tre//
- Lightweight, robust, and almost fully POSIX compliant regexp matching library which supports approximate matches. [GNU GPL].
regex
- http://arglist.com/regex/
- 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.