Items.
When bonded with a zoid, the zoid gets a speed/strength boost, though any damage taken by the zoid the Organoid feels. Organoids are capable of fighting without being bonded to a zoid, as Shadow demonstrates in Raven's attack of the base. Most are equipped with some sort of thruster unit, though that is not always the case. (Shadow) All the Organoids that have been documented have been raptor shaped thus far.
Black Box
This item is found in Ultimate X's. It it believed that this is the remains of a permanately bonded Organoid. This allows the zoid to learn and grow from watching other zoid's combat strategy. This also allows the zoid to function without needing a pilot.
Zoid Core
Much is unknown about this item, but this allows zoids to evolve. This also allows Sleeper (wild) zoids to function without a pilot, though they cannot fight very well. (Mostly they run away) This has been modified by Prozen to create the Geno Saurer.
Beek System
This system was invented by Thomas Schubaltz. It acts as an artificial Organoid, though doesn't seem to be sentient. It communicates directly with the pilot by using a special helmet.