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
Freenet is a peer-to-peer platform for censorship-resistant communication. It uses a decentralized distributed data store to keep and deliver information, and has a suite of free software for publishing and communicating on the Web without fear of censorship. Developed by The Freenet Project
License: Open Source
I2P is primarily focused on providing anonymity and hidden services, making it suitable for users looking for a private browsing experience. In contrast, Freenet emphasizes data persistence and ease of use for hosting content, making it more suitable for users looking to share and access information over the long term.