BridJ is a young project with limitations (in particular with respect to passing structs-by-value, C++ templates and ObjectiveC support...). It was inspired by JNA but it has : uncompromised speed (thanks to dyncall and assembler optimizations) more features : (limited) support for C++, COM, Objective-C... better usability : Java 1.5+ generics, annotations... a liberal BSD license (GPL-compatible)