The Robot was made in Blender and rigged in blender too. The only animation it has just a Standard Walk and nothing more. In each folder you'll get 2 files one which is rigged known as FINAL and the other one which is only a model known as ONLY ROBOT. If you don't like my Rig or want to rig it by yourself you can use ONLY MODEL to do that. There is just only 2 textures and I think that would be enough. You can see animation preview on my youtube channel.I'll suggest to use blender since its a native file of blender and blender is free. you can BLEND file in your Blender and rig or export it However you want.CHECK OUT MY OTHER MODELS and HAVE A NICE DAY....