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 powerful tool aimed at technical users who need flexibility and integration in their diagramming process, while Lovely Charts offers a more user-friendly experience with strong collaboration features, making it suitable for non-technical users. PlantUML excels in creating complex diagrams through text, whereas Lovely Charts focuses on ease of use and visual appeal.