Caterpillar-0.5.18b61.jar is a release file of the Minecraft mod Caterpillar, made for Minecraft 1.8. It was published on December 10, 2015 and is 0.2 MB in size. For the full description, screenshots and every other version, visit the Caterpillar mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.