yamljs
Standalone JavaScript YAML 1.2 Parser & Encoder. Works under node.js and all major browsers. Also brings command line YAML/JSON conversion tools.
jy-transform
This project aims to read, write and transform YAML, JS or JSON objects into each other using CLI or API, while the source and destination resources can be files on CLI and additionally, objects or streams on API level.
plist2
Converts between .tmLanguage(.plist), .json, .cson and .yaml formats