The Creative Mechanical Generator is a creative block added by Better With Mods. It will generate a constant source of Mechanical Power at no cost. When an axle is placed on any of the 6 sides of the block it will automatically be powered. Similarly, Gearboxes will be powered if they are placed with their input side facing the Creative Mechanical Generator.
As the name suggests, the Creative Mechanical Generator is not obtainable by crafting and can only be acquired through Creative mode, commands, or NEI / JEI cheat mode.