Jayrock makes it very simple to create and maintain JSON RPC services. It is as simple as creating a webservice method and provides a nice test interface. I have used it on several projects and am quite pleased.
by ajf88
I've been using Jayrock to encode and decode JSON for quite some time in my application which is a remote admin client for the transmission bittorrent client.
I can't think of any problems I've had with Jayrock. A very reliable software component.