JSON-RPC implementation

Below is a list of implementations, but it is many ways a bit dated.

Please visit  http://en.wikipedia.org/wiki/JSON-RPC#Implementations for a community updated list.

JavaScript

•  easyXDM is a library for cross-domain communication with a built in RPC feature. The library uses HTML5 postMessage when available, or FIM/window.name when not.
•  Pmrpc is an inter-window cross-domain remote procedure call JavaScript library for use within browsers. Pmrpc is an implementation of JSON-RPC using  HTML5 postMessage API for message transport.
• There is a JSON-RPC implementations as part of JavaScript O Lait  jsolait.
  You can also find some live  examples
• The  Open Source TelePort Library supports JSON-RPC as well as other RPC protocols.
  Live demos and documentation can be found  here.
•  JSON-RPC to Java bridge includes a JavaScript client.
•  Dojo Toolkit 0.3 implements JSON RPC.
•  JSON/XML-RPC Client Implementation which abstracts-away the differences between JSON-RPC and XML-RPC and permits cross-site requests.
•  Wakanda implements a JSON-RPC Client in its WAF framework and a JSON-RPC Server (with Server-Side JavaScript?).
•  pyjamas is like Google Web Toolkit, but you program in python. Also useful for desktop apps. Uses JSON-RPC for communication.

C

•  JSON-RPC C Bridge. There is also support for  GoAhead WebServers.

C++

•  JsonRpc-Cpp - GPL v3 library

C#

•  Jayrock - .NET and ASP.NET

Erlang

•  YAWS JSON-RPC module (HTTP client/server)

Objective-C

•  Asynchronous JSON-RPC Service Proxy
•  objc-JSONRpc

Java

•  JSON-RPC to Java bridge
•  JRP
•  jj1 (JSON-RPC HTTP client/server)
•  JSON-RPC 2.0 Base is a minimalist implementation, with no framework or transport dependencies
•  JSON-RPC 2.0 Console Client for querying, testing and debugging JSON-RPC 2.0 web services
•  jpoxy Very thin JSON-RPC implementation for rapid development.
•  Simple Java JSON-RPC (com.werxltd.jsonrpc) For exposing methods in existing POJOs via JSON-RPC Moved to jpoxy
•  java-json-rpc JSON-RPC 2.0 implementation for J2EE servers
•  json-lib JSON-RPC implementation.

Lisp

•  CL-JSON - Common Lisp

Lua

•  JSONRPC4Lua

Perl

•  JSON::RPC::Common is a complete transport agnostic implementation of JSONRPC 1.0, 1.1 and 2.0
•  RPC::Any is a simple, unified interface to JSON-RPC 1.0, 1.1, and 2.0 (and XML-RPC)
•  Catalyst using the  JSONRPC plugin
•  JSON module

Php

•  JSON-PHP
•  php-json
•  PHP-O-Lait
•  Phpxmlrpc (in the 'extras' package)
•  SCA_SDO Pecl Package
•  JSON_RPC_Server, a JSON-RPC implementation in PHP
•  JSON/XML-RPC Server Implementation which abstracts-away the differences between JSON-RPC and XML-RPC.
•  Tivoka, lightweight object oriented JSON-RPC 2.0 package implementing client and server.

Python

• A python package which implements the JSON-RPC specs. It includes an mod_python handler, a CGIHandler, a TCP server and (soon) a ServiceProxies implementation.
•  python-symmetric-jsonrpc implements JSON-RPC over sockets/ssl sockets such that client and server can both call methods on each other (also thread-safe and asynchronous).
•  django-json-rpc JSON-RPC server for versions 1.0, 1.1 and 2.0 (well tested, clean implementation) Includes service proxy
•  Zope 2
•  Twisted JSON-RPC - Web, Web2, and TCP
•  lovely.jsonrpc JSON-RPC package for python

Ruby

•  Ruby
•  http://github.com/PeterBengtson/json-rpc-1-1 complete server and client implementation of JSON-RPC 1.1 for Ruby on Rails

Frameworks

•  Catalyst (Perl) using the  JSONRPC plugin
•  CherryPy (python)
•  JRP
•  .NET and ASP.NET
•  Zope 2
•  Zope 3
•  Django and  django-json-rpc