json4s/json4s

A single AST to be used by other scala json libraries

argonaut-io/argonaut

Purely functional JSON parser and library in scala.

scalatra/scalatra

Tiny Scala high-performance, async web framework, inspired by Sinatra

hseeberger/akka-http-json

Integrate some of the best JSON libs in Scala with Akka HTTP

non/jawn

Jawn is for parsing jay-sawn (JSON)

gnieh/diffson

A scala diff/patch library for Json

skinny-framework/skinny-micro

:microphone: Micro Web framework to build Servlet applications in Scala, the core part of Skinny Framework 2

julienrf/play-json-derived-codecs

spray/spray-json

A lightweight, clean and simple JSON implementation in Scala

jto/validation

validation api extracted from play

ngs-doo/dsl-json

High performance JVM JSON library

tethys-json/tethys

AST free JSON library for Scala

ovotech/kafka-serialization

Lego bricks to build Apache Kafka serializers and deserializers

scalapb-json/scalapb-json-common

common classes for scalapb-json libraries

nevillelyh/protobuf-generic

Generic protobuf manipulation

sciss/play-json-sealed

Automatic sealed traits JSON format for play-json-alone

agourlay/cornichon

Scala DSL for testing HTTP JSON API

mdedetrich/scalajson

ScalaJSON - JSON for Scala, currently contains minimal AST

jilen/play-circe

circe for play

outr/profig

Powerful configuration management for Scala (JSON, properties, command-line arguments, and environment variables)