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
LaTeX Beamer is ideal for academic and technical presentations that require high-quality typesetting and customization through code, while LibreOffice Impress offers a more user-friendly interface with rich features for multimedia and collaboration. Prosper, while similar to Beamer, has a more limited scope and is less supported, making LaTeX Beamer the preferred choice for specialized needs.