apache-camel-basics
Calling a REST service from Apache Camel
How to call a REST API from Apache Camel, using Camel's HTTP component
Apache Camel tutorial for beginners
Dust off your desert gear, we're going for a Camel ride. Learn the basics of Apache Camel (without having to cross the Sahara)
A beginner's guide to WSDL and an example
If you're learning how to consume or provide SOAP services, you might find this free WSDL file example useful.