The Invisible Internet Project (I2P) is a garlic routing using overlay network and darknet that allows applications to send messages to each other pseudonymously and securely. Uses include anonymous Web surfing, chatting, blogging and file transfers. The software that implements this layer is called an I2P router and a computer running I2P is called an I2P node.
License: Open Source
I2P is a decentralized network designed for anonymous communication while providing hidden services, making it ideal for users prioritizing privacy. Spotflux, on the other hand, is a user-friendly VPN solution that focuses on encryption and bypassing geographical restrictions, suitable for general users looking for simplicity and ease of use.