Won't have a browser installed? Try prezi, it's a flash based web-app. Oh, and they have an app for the bastions of anti-flash, iPad, too. You can export the prezi as a .exe file if you won't have a 'net connection. So you'll only be stuck on locked down computers that won't run executable files and also have no internet connection. In my world that's not many.

I think more like the Welsh with their unintelligable language...