BarterMachine is available
You should install Metamask first before using BarterMachine.
BarterMachine is provided as is without any warranty. Use at your own risk.
BarterMachine is a decentralized autonomous system. Once deployed, it is not controlled by anyone - it cannot be stopped, paused or intervened. Bartermachine is an academic/educational system that has been developed to teach about and to experiment with decentralized Barter Economy on blockchains.
Note that Bloxberg blockchain runs the newly released BarterMachine (version-2 named Kantara) whereas Ropsten runs the older (version-1 named Buffavento).