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