LaTeX Beamer and Prosper makes the most professionally typset documents with a large number of amazingly useful features not available from other types of presentation software.
License: Open Source
Keynote is a user-friendly presentation software with rich multimedia support, making it ideal for quick and collaborative presentations. In contrast, LaTeX Beamer and Prosper offer high-quality typesetting and greater control over content formatting, making them preferable for academic and technical presentations.