where I use ADF Security combined with the IDM framework and retrieve ldap attributes etc.

Asynchronous jax-ws service

example where I use ADF Rich faces ListOfValues based on an EJB ( Dynamic JQL) and other handy stuff with EJB

generate a Web Service on top of an EJB Session Bean

call the Apple ITunes Rest service which return JSON with Jersey and GSON marshalled to java.
With an ADF search panel around this ITunes JSON Service

JMS clients for WebLogic, GlassFish 3.1 and JBoss 7.1

with all oneToMany relations with Lazy FetchType, with left join fetch and Fetch QueryType.

Java entities passed on to PLSQL collection and types
this is done to do a bulk update and insert. it uses EclipseLink , Oracle PL/SQL packages , Oracle Types, PLSQL Xollections

with JAX-RPC and send SOAP messages over JMS

commonj timer for a weblogic server or cluster

SCA Java with weblogic