Open-Source Implementations Cisco P2PSIP Project (draft-jennings-p2psip-asp) Columbia P2PP Project (draft-baset-p2psip-p2pp) SIPDHT2 Project (draft-marocco-p2psip-xpp, draft-marocco-p2psip-xpp-pcan) SIPDHT Project (draft-bryan-sipping-p2p) (no longer maintained) University of Parma Kademlia dSIP Implementation (draft-cirani-p2psip-dsip-dhtkademlia, draft-bryan-p2psip-dsip) Huawei's implementation