Milton Mamani gave a presentation on updates to Roassal, a tool for visualizing data. Key updates include the ability to export visualizations to new file formats like SVG, better support for UML classes, new chart types like kiviat and sankey diagrams, additional layout algorithms from Graphviz, and animations for transitions. Future work includes addressing scaling problems and implementing new layouts like rectangle trees. Roassal is open source software created by Alexandre Bergel to help explain data through interactive visual stories.