We have specs for the accumulator and basic p2p stuff. Working on cache rn. We should have something public soon.

We also have:
A Golang lib at https://github.com/utreexo/utreexo
A rust lib at https://github.com/mit-dci/rustreexo

And two implementations of the bitcoin consensus that uses utreexo:
Utreexod: https://github.com/utreexo/utreexo
Floresta: https://github.com/vinteumorg/floresta