I’ve published a preliminary version of my Rest library RaREST (v.0.9). There are still a couple of things missing (specially logging configuration) and much more testing won’t hurt anyone, but if any of you wants to try it, feel free to download and give feedback.
RaREST is based on a single configuration file that contains all the rest services info needed to invoke them, so it makes the amount of code needed very short.
It supports using services as template for other services, preprocessing and postprocessing of the REST call and many other functionalities.
There is still lack for a lot of improvement (anybody said mulipart?) but is a good starting point.
It’s licensed under Apache 2.0 and you cand find source, downloadables and documentation on http://code.google.com/p/rarest/