Eclipse Parsson provides an implementation of Jakarta JSON Processing Specification. It allows processing (e.g. parse, generate, transform and query) JSON documents.
Eclipse Wild Web Developer™ integrates existing artifacts like TextMate grammars and Language Servers to provide a rich development experience to Web developers using typical programming languages
Eclipse Yasson™ is a Java framework which provides a standard binding layer between Java classes and JSON documents. This is similar to what JAXB is doing in the XML world.