JSON查看
http://jsonviewer.codeplex.com/

JSON转类(非常好使)
http://jsonclassgenerator.codeplex.com

https://github.com/lbv/litjson

https://github.com/kevin-montrose/Jil

https://github.com/ServiceStack/ServiceStack.Text

http://json.codeplex.com

http://www.codeproject.com/Articles/159450/fastJSON

FF插件

Refer:
json-net-vs-servicestack
http://daniel.wertheim.se/2011/02/07/json-net-vs-servicestack/