JSON Libraries
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Fastjson is a JSON processor (JSON parser + JSON generator) written in Java
Last Release on Aug 3, 2026

A library to query and verify JSON
Last Release on Feb 22, 2026
Add-on module for Jackson (https://github.com/FasterXML/jackson/) to support Kotlin language, specifically introspection of method/constructor parameter names, without having to add explicit property name annotation.
Last Release on Jul 9, 2026

Jersey JSON Jackson (2.x) entity providers support module.
Last Release on Jun 12, 2026
Core classes for Circe, a JSON library for Scala developed with a focus on performance.
Last Release on Jun 25, 2026
Circe Parser is a wrapper around the Jawn JSON parser (in the JVM) and for the built-in JSON.parse (in JavaScript).
Last Release on Jun 25, 2026
Groovy: A powerful multi-faceted language for the JVM
Last Release on Aug 2, 2026
Automatic codec derivation for Circe (based on Shapeless)
Last Release on Jun 25, 2026
A StAX implementation for JSON.
Last Release on Jul 25, 2026
Generating/parsing JSON from/to Clojure data structures
Last Release on Jan 2, 2026