Freenet manages to implement some kind of anonymity without mixnets, relying on inserting/retrieving storage blocks sacrificing latency. In my opinion that's the better approach, because if you separate storage and communication, like ipfs-over-tor, you'll never get anything with proper anonymity and decent performance.

Beyond that, I've heard of xolotl related to gnunet, but I am not sure to what extent it is actually implemented and/or working, as usual with gnunet.