Impress is a truly outstanding tool for creating effective multimedia presentations. Presentation edition and creation is flexible, thanks to different editing and view modes: Normal (for general editing), Outline (for organizing and outlining your text content), Notes (for viewing and editing the notes attached to a slide), Handout (for producing paper-based material), and Slide Sorter (for a thumbnail sheet view that lets you quickly locate and order your slides).
LibreOffice Still is the stable version that has undergone more testing (over a longer time).
It is usually recommended for more conservative use.