http://quetre.catsarch.i2p/profile/Eric-Pudalov
It doesn’t mean that people aren’t aware of it, but yes, it exists. I2P and Freenet have similar purposes, although the technical details are different. Like Tor, I2P says on their website: “I2P is an anonymous overlay network…it is intended to protect communication from dragnet surveillance and monitoring from third parties such as ISPs.