2. Esutilsutility box for ECMAScript language tools
3. EstemplateProper (AST-based) JavaScript code templating with source maps support.
4. Esdispatchtrigger events based on esquery selectors during a traversal of a SpiderMonkey format AST
8. Esmangleesmangle is mangler / minifier for Mozilla Parser API AST
9. esvalidconfirm that a SpiderMonkey format AST represents an ECMAScript program