Explore PenPot, an open-source UI/UX design and prototyping app, in this comprehensive tutorial video. Discover the browser-based, free alternative to popular design tools as you learn to navigate the interface, create designs, and prototype. Begin with an overview of the UI, then dive into practical exercises including designing a navigation, crafting headlines, creating card designs, and implementing call-to-actions. Progress to building a secondary page and explore the prototyping capabilities. Conclude with a final project showcase and insights into PenPot's future developments, including planned features like auto-layout, component states, and plugins.