Apart from the obvious js-ipfs and go-ipfs, check out ipfs-cluster and LivePeer. libp2p is actually meant to be pretty high-level so I'm not aware of more high-level libraries.
Actually, a few minutes later, diggan set my understanding of your question straight :) Check out peer-crdt, the ipfs/y.js bridge, ipfs-pubsub-room, and orbitdb!
