Freight is an API-driven task runner developed by Sentry to manage continuous deployment with better control over where and when to deploy, addressing issues with Jenkins' API and providing features such as multiple apps and environments management, source repository management, basic workspace management, deploy provider abstraction, validation checks, and notifiers. It's designed to be reusable and accessible tooling, allowing for quick integration with various tools like React-based frontend and hubot-freight integrations. Freight is an open-source project, and its development is publicly available on GitHub, making it easy to try out and provide feedback.