Ambiera CopperCube Professional 6.7.0 (x64) Multilingual Portable | 52.3 Mb
CopperCube is a complete 3D authoring tool which includes all the features you need for creating games for multiple platforms. And it is light-weight: The whole editor including everything just needs about 70 MB, and your finished created games is just one small .exe file. Or a just 200 KB sized .js file in case of WebGL.