Protobuf-codec is a project mainly written in Java, based on the Apache-2.0 license.
Protocol Buffer coder/decoder
Protobuf-codec provides codec for protobuf and other data formats like xml/json. It is fast and relies on proven frameworks like jackson for json and woodstox for xml for parsing.
This library is listed under the protobuf third party addons page ( http://code.google.com/p/protobuf/wiki/ThirdPartyAddOns ) as "Another JSON encoder/decoder for Java"
Project Wiki
20/Aug/11 : Disted version 1.2
03/Jan/11 : Disted version 1.1
08/Dec : Disted version 1.0
06/Dec :
Raise bugs/issues on [git] (https://github.com/sijuv/protobuf-codec/issues)