OpenBazaar is a decentralized marketplace for goods and services with no fees and no censorship. Anyone can host their own store and sell products to anyone in the world. You can optionally elect to have a third party to mediate in the event of a dispute (e.g. my package never arrived in the mail) to protect yourself. Beyond the dispute resolution, all transactions are handled directly between buyer and seller.
OpenBazaar received some buzz last year when they received a $1 million dollar investment from Andreessen Horowitz. The first iteration of the platform only supported Bitcoin, however you can now transact in a number of other currencies, including Ether.
Check out the full post on the OpenBazaar blog: