ABL is a transaction logic engine: it allows you to declare complex, multi-table transaction logic for your persistent objects, using simple declarative annotations.
ABL operates as a HIbernate/JPA event listener to eliminate recoding and automate integrity.
J2J provides an intuitive way to convert Java to JSON and JSON to Java. Annotate any Java class then use JsonWriter to emit JSON from java or JsonReader to convert JSON to java objects. (source code and tutorial included) Version 2.0 in development.