Are those the chunk loaders that have to be powered by ender pearls? (believe it's the ones from Railcraft that need that "fuel").
Run down:
World Anchor: From Railcraft, takes 1 pearl for 12 hours of 3x3 chunk loading.
Personal Anchor: Railcraft, takes 1 pearl/12 hours of 3x3 chunk loading but only while the owner of the loader is online.
Admin Anchor: Railcraft, same as world anchor, but takes no pearls. Cannot be crafted
Chunk loader module: Steve's Carts 2, module for carts. Can be enabled with the Ui.
Chunk Loader: Chicken Chunks, free to use and can be configured. Settings like max radius / total chunks allowed depends on the config files.
Spot Loader. Chicken Chunks, loads only the chunk containing itself.
Chunk Loading Turtle: MiscPeripherals turtle upgrade, loads an area (size is changed in config files) and also functions as a wireless modem.
The Railcraft chunk loaders can be put in minecarts.