Cjdns is a networking protocol, a system of digital rules for message exchange between computers. The philosophy behind cjdns is that networks should be easy to set up, protocols should scale up smoothly and security should be ubiquitous.
License: Open Source
NameCoin focuses on creating a decentralized domain name system using blockchain technology, while cjdns aims to establish a secure, peer-to-peer networking protocol. Both technologies emphasize decentralization and security, but they serve different purposes within the internet ecosystem.