Provided free with the purchase of an iOS device, Keynote is the market leading presentation software. Similar to Pages and Numbers it works in iCloud, has many templates to give a start to a presentation and links via airplay for presentation to a group.
With collaboration features a group can work together to create a business presentation.
Using Keynote live you can give your presentation to anyone with a modern web browser whether they are in the same room or in a different country.