Redis - Project Hosting on Google Code. Hyperjaxb3: Hyperjaxb3 - relational persistence for JAXB objects. JPA with Hibernate and Spring: Fucking Cool(tm) Yep.
Really.. The True Way Of Developing Applications has been disturbed and that is damn good. For starters, please take a moment to read these articles in order: Getting started with JPA and SpringJPA Annotations GuideAdvanced JPA with spring. Persist - Google Code.