PlantUML is an open-source tool allowing users to create UML diagrams from a plain text language. Developed by Arnaud Roques
License: Open Source
PlantUML is a text-based tool primarily focused on creating UML diagrams, making it ideal for developers who need to visualize software architecture. In contrast, TheBrain is a dynamic mind mapping software designed for knowledge management and organization, suitable for users wanting to visualize complex information and relationships.