@gungasnake,
gungasnake wrote:Has to be free. Msoft has its own version of something like that called live meeting, which might also work.
I think Microsoft uses Lync for that now.
But if it has to be completely free then you may have to go with OpenSource stuff from SourceForge.
Join.Me is also free, but I've only used it for 1-to-1 screen sharing, I've never tried it as a presentation layer for multiple people.
How many people are you trying to present to, and do you know them or is this for some type of Online "open access" presentation?