open source presentation software

See the following -

5 Myths Busted: Using Open Source in Higher Education

Have you ever heard someone say, "It's impossible to do X with Linux"? Me too. This is the story of how I busted the myths about open source in my own head and used Linux to finish my PhD in fine arts. Many people think non-technical students can't use Linux, and they make a lot of assumptions about people who use it in their advanced degree programs. They scoff and reply with something along the lines of, "Well, of course; those people do 'computer stuff,' but in my [lofty, important, unique area] it's just not possible." Well, it is possible, and I'm proof...