The main goal of Callisto is to research and develop a reference implementation of a self-sustaining, self-governed, self-funded blockchain ecosystem and development environment. Callisto aims to establish a secure and contribution-friendly environment for further protocol development and improvements. It will rely on a built-in system of smart-contracts to achieve this goal.
This is where Pibble comes in. Pibble is a Blockchain based image Cryptocurrency! It is a monetized Image Ecosystem that brings image creators and consumers together, so as to compensate them for the work they create, use and enjoy.