...
The Mail and JMS component currently depend on Spring JARs. There is a work in progress patch for the Mail component to be able to run without Spring. The JMS component is however heavily dependent on Spring, as it uses spring-jms. We may in the future consider writing a new light weight JMS component that has less features, but can work without Spring. However this is not the goal for Camel 2.9. If we do our own jms abstraction which might be a good idea then we should put it in a apache commons project as it would also help other projects like cxf.