URL: http://code.google.com/p/protobuf/downloads/list Version: 2.2.0a License: Google BSD like Description: "Protobuf: The Google protobuf compiler and runtimes for various languages" Local Modifications: Initial changes include support for the micro protobuf compiler and the assoicated runtime. Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats. Initially the protoc compiler is not integrated into the Android build system and the Android.mk will simply build the javamicro runtime static library. To build the compiler follow the instructions in README.txt for compiling and installing. The Android.mk file creates the a static library which can be added to any Android application by Adding to LOCAL_STATIC_JAVA_LIBRARIES com.google.protobuf.micro: LOCAL_STATIC_JAVA_LIBRARIES += com.google.protobuf.micro Follow the instructions in Micro section of java/README.txt for details on compiling .proto files for the micro runtine.