Fabric is one of the most popular of the Hyperledger projects for good reason. It's highly modular, designed for coordination across companies, and the private channel feature enables secure functionality that's impossible on public chains, and even most private ones. Moreover, Hyperledger Fabric has Composer—a visual tool for architecting blockchain applications. We'll discuss Composer later in the section on Hyperledger tools.

Next, we'll cover Iroha, a Hyperledger project aimed at bringing blockchain to mobile devices.