Excelsior JET for Windows 

Excelsior JET is a Java Virtual Machine enhanced with Ahead-Of-Time (AOT) compilation. The AOT compiler transforms your classes and jars into high-performance Windows executables. Version for Linux on the Intel x86 platform is also available.
java exe dll compiler native ahead-of-time

Janino 

Janino is a compiler that reads a Java expression, block, or source file, and generates Java bytecode that is loaded and executed directly. It is not intended to be a development tool, but an embedded compiler for run-time compilation purposes.
java compiler embedded expression evaluation script scripting virtual machine bytecode run-time compilation jsp