This papercraft is Optimus Prime. Optimus Prime is a character in the Transformers universe. He is the leader of the Autobots, a faction of heroic Transformers from the planet Cybertron who wage their battles against the evil forces of the Decepticons for control of their homeworld, and by extension, peace in the universe.
Optimus Prime is depicted as a heroic, brave and compassionate character who puts all his talent to use to improve the world around him.
Optimus has a strong sense of justice and righteousness, and has dedicated himself to the protection of all life, particularly the inhabitants of Earth; he will battle his foes with unyielding resolve to uphold this belief.
You can download at here: Transformers Papercraft - Optimus Prime [via 4shared]