The Ultranet is the first truly decentralized private marketplace. It is a marketplace where all transactions are end-to-end encrypted and where all data, including all merchant listings, is preserved as long as a single node somewhere in the world is running the software. It has a native cryptocurrency called Ultra, which is used by buyers on the platform to make purchases and by merchants on the platform to promote their listings.
Ultra can be purchased in minutes using Bitcoin through a decentralized exchange built-in to the Ultranet app, which seems to make it a good fit for ICO Drops (users just need to download the app to purchase Ultra, which they can do today because it's fully launched).
The platform has been in development for over a year, and launched two weeks ago. Since then, thousands of dollars worth of Ultra has been purchased on the app's built-in decentralized exchange using Bitcoin, over 300 people have downloaded the desktop app, and nearly 100 people are actively mining Ultra. The project has gone viral on Reddit (see link below) and has a vibrant subreddit community with nearly 100 members (see link below).
Part of the success was due to the blog I put up as the creator of the project, which has garnered tens of thousands of views since the launch a few weeks ago. The blog describes a lot of the technical innovations behind the system, including its built-in decentralized Bitcoin exchange and its novel "block pool" data structure:
The project is fully open-source and has a Github repo (see link below) with 20 stars and several contributors creating issues (3 minor issues reported and resolved by the community so far).