There is package named language-dart on Hackage by Kwang Yul Seo. The package includes the Dart AST and pretty-printer, but no parser. It hasn't been updated in 2 years. I have implemented a parser in a pull request (https://github.com/kseo/language-dart/pull/1) but the original author says he doesn't have time to maintain this package at the moment and is willing to transfer its maintainance. As for myself, I'd be happy to help as a co-maintainer but I feel that a proper feeding and care of the package requires somebody with interest in Google Dart per se. Does anybody here fit this description?