Optimus Prime (Transformers: Revenge of the Fallen)
Agent Venom (Ultimate Spider-Man)
General Rilldo (Dragon Ball GT)
Android 13 (Dragon Ball Z)
Lagann (Gurren Lagann)
The B.R.A.I. (Juushinki Pandora)
Drakken Joe (Edens Zero); via Mutated Form
Vayne Carudas Solidor (Final Fantasy XII); as the Undying
Krudzu (Sonic the Hedgehog)
Krudzu Hybrid Hydra (Sonic the Hedgehog)
Zero (Mega Man series)
Dr. Wiel (Mega Man Zero series)
The Borg (Star Trek)
Cybermen (Doctor Who)
Alpha (Men in Black: The Series)
Truth (Eureka Seven AO)
Makino (Max Steel)
After his change into a cyborg, Victor Stone (DC Comics) can control and/or alienate tech/machines at will.
Cyborg Superman (DC Comics) has the innate ability to merge with and alternate any source of technology making him part of it and vice versa be it remotely or directly.
Through a series of empowerment's and upgrades, Metallo (DC Comics) is able to physiologically absorb cybernetics and technology into himself, growing to monolithic proportions as a gesture of his modifications.
General Rilldo (Dragon Ball GT) can merge with the technology on his entire home planet.
After having subverted the global environmental regulations system I.S.A.A.C, Ultron (Marvel Comics) had effectively assimilated its faux environs becoming a living moon.
Brainiac and Lex Luthor (Justice League Unlimited) fused with the Dark Heart nanotechnology.
Agent Venom's (Ultimate Spider-Man) symbiote can assimilate technology, such as the Beetle's missile launchers.
Malware (Ben 10: Omniverse)
Technus (Danny Phantom) can assemble technology and create his own battle suit that increase his durability and strength.