R – tools for developing RESTful web services


What tools are recommended to aid in developing RESTful web services? For instance, a good front end for manually calling REST APIs, and a TCP/IP or HTTP monitoring tool seem like good starting points. I am looking for specific product recommendations. OS X recommendations would also be helpful.

Best Solution

I use Poster (a FireFox plugin) for manually calling REST web services:


(I find the UI is difficult to work with and would like something better.)