CRUD through HTTP is a good step forward to using resources and becoming RESTful. Another step further into it is to make use of hypermedia-based services and the Restfulie gem allows you to do it very quickly.
Marley is a framework for quickly building RESTful Web services and applications with Ruby. Development is fast because Marley implements lots of sensible defaults, all of which can be overridden.
A network IDS and IPS engine.
A Java library for reporting.