EGG Versio 4.0 --- Code name "Tamagotchy" NIIBE Yutaka Mitsubishi Research Institute, Inc. We've started this project with the code of EGG V3.0 in the beginning. However, we chose to rewrite whole of them, while referring the design and interface of EGG V3.0. In original version of EGG (to V3.0), it seems for me that there's no copyright notice. But it has been widely distributed on the Internet under the licence of GPL: