libregex

Currently this library supports regex searching, matching and replacing, with both case-sensitive and case-insensitive variants.

The C++ portion of this library is released under the GNU LGPL license.

Update 08/22/09: I've included compiled .dll and .so files in the /bin directory. These are distributed without any guarantees or warranty; if they don't work for you, you can compile the source yourself (it is in the /src directory).