1. SwarmJavaScript replicated model (M of MVC) library
2. Swiftthe multiparty transport protocol (aka "TCP with swarming" or "BitTorrent at the transport layer")
4. Ron(dated, see the site) Replicated Object Notation, a distributed live data format, golang/ragel lib
8. citrea-modelA CRDT-based collaborative editor engine of letters.yandex.ru (2012, historical)