http://openjdk.java.net/projects/panama/

http://openjdk.java.net/jeps/191

Java Native Runtime - https://github.com/jnr

Java Native Access - https://github.com/twall/jna

https://blogs.oracle.com/jrose/entry/the_isthmus_in_the_vm

BridJ: Let Java & Scala call C, C++, Objective-C, C#... - https://code.google.com/p/bridj/