JSR 354 Specification (API)
Find more details on the API/specification here.
JSR 354 Reference Implementation (RI)
Check out the referenceimplementation here.
Technical Compatibility Kit (TCK)
Want to write your own implementation of JSR 354? The you should also checkout and configure the TCK. Start here.
JavaMoney Financial Library
Find out more about the JavaMoney Financial Library here.