P5-RTF-Parser is a project mainly written in Perl, it's free.
Perl 5 module to extract text from MS Word files
Please note this is a beta release from a new maintainer. The original release had no documentation or tests - I hope to get around to writing those in time.
The rtf2html program, as the original author states, is just a an example, not a fully-fledged application.
+Pete Sergeant
Work on RTF processing modules is being carried out under a grant from The Perl Foundation.