Apache Zeppelin is an emerging open-source tool for data visualization that allows for interactive data analytics. It provides a web-based notebook interface that allows users to write and execute code in languages like SQL and Scala. The tool offers features like built-in visualization capabilities, pivot tables, dynamic forms, and collaboration tools. Zeppelin works with backends like Apache Spark and uses interpreters to connect to different data processing systems. It is predicted to influence big data visualization in the coming years.