CPAN::Meta::YAML (3perl) - Read and write a subset of YAML for CPAN Meta files
Module::Build::YAML (3perl) - DEPRECATED
TAP::Parser::Result::YAML (3perl) - YAML result token.
TAP::Parser::YAMLish::Reader (3perl) - Read YAMLish data from iterator
TAP::Parser::YAMLish::Writer (3perl) - Write YAMLish data
YAML::Tiny (3pm)     - Read/Write YAML files with as little code as possible