S4FE is a freely accessible, blockchain based search engine dedicated to the protection of property. It provides a global network for the registration of items and the recovery of lost or stolen property.
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.