Yaml3-pm is a project mainly written in Perl, it's free.
YAML Implementation for Perl 5 using Pegex
NAME YAML3 -Yet Another YAML Implementation using a Grammar :)
STATUS Don't walk away. Run!
SYNOPSIS use YAML3;
DESCRIPTION YAML3 ....
AUTHOR Ingy döt Net [email protected]
COPYRIGHT Copyright (c) 2010. Ingy döt Net.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See <http://www.perl.com/perl/misc/Artistic.html>