Metasploit Framework

Vagrant is a tool for building and distributing development environments.

Chef Infra, a powerful automation platform that transforms infrastructure into code automating how infrastructure is configured, deployed and managed across any environment, at any scale

Server automation framework and application

InSpec: Auditing and Testing Framework

Travis CI Client (CLI and Ruby library)

Shopify CLI helps you build against the Shopify platform faster.

Pentest environment deployer (kali linux + targets) using vagrant and chef.

Distributed Twitter implementation in Git.

Config Variables for your Flutter Apps.

homebrew ("the missing package manager for OS X") formulae from the mbed team.