I was invited for the Hackathon at the 15th International Anti-Corruption Conference in Brasília. Together with the Transparency Hackers of Brazil we stayed in the Hacker House, drove around with the Hacker bus and built cool things related to corruption prevention.
I built FOIReminder, a software that reminds you to make regual inquiries about a topic using one of the national FOI portals. I deployed a version, but the idea never took off. I think it needs some more context or specific use cases.
After Brasília I stayed a couple of days in São Paulo.