Emsoft-net is an open source net utils library for Java 1.6+. Contains manager for unified work with rest services.
Project Open Provisioning ToolKit (OpenPTK) is as an open source User Provisioning Toolkit exposing Java API's, RESTful Web Services, JSP Taglibs, JSR-168 Portlets and WSDL-based Web Services with user self-service and administration examples. The architecture supports several pluggable back-end services including Oracle's Identity Manager, Sun's Identity Manager, Sun's Access Manager, JDBC and LDAPv3
Statistics and analytics Java EE 6 software for blogs (tested with roller) and webapps. It is a vanilla Java EE 6 (REST/JAX-RS, CDI, EJB, JPA) app, tested on Glassfish v3.1, built with Maven 3 / hudson and developed with NetBeans 7. X-ray is the sample app of the "Real World Night Hacks" book.