Freenet, 
Some short-term history: in 2021 we finally mitigated the pitch black attack that had been found by the #GNUnet folks.
With this the friend-to-friend mode that was introduced in 2007 got robust enough that nowadays people can rely on it for hidden #communication.
In the same release (1492) #decentralized streaming of video on demand started to work well enough to share conference talks: https://freenetproject.org/freenet-build-1492-released-video-diagnostics-pitch-black-plugins.html
