By far the best, very Django-like in fact is [Play | http://www.playframework.org/].

Some other RESTful services are
* [Jersey | https://jersey.dev.java.net/] - Implementation of [JAX-RS | https://jsr311.dev.java.net/], the standard API for RESTful web services which is to be included in Java EE 6
* [Restlet | http://www.restlet.org/]
* Spring 3.0

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[CategoryComputing.Lang.Java] [CategoryComputing.Networking]