Explore JUnit's evolution as a foundational Java testing framework, its unique open source business model, diverse funding strategies, and the vibrant community of the JUnitTeam. This article delves into how JUnit sustains its development through volunteer contributions, corporate sponsorships, and grants, while maintaining transparency and legal robustness with the Eclipse Public License 2.0. Learn about the challenges and future trends in open source funding, including potential blockchain-based solutions, that ensure the longevity and innovation of JUnit in modern software development.