LibreOffice Impress vs. Airtime

LibreOffice Impress is a powerful, free, and open-source presentation program that enables users to create and deliver professional multimedia presentations. As part of the LibreOffice suite, Impress offers a comprehensive set of tools for designing slides that can include text, images, diagrams, and multimedia elements. It supports various editing and viewing modes, such as Normal, Outline, Notes, Handout, and Slide Sorter, facilitating versatile slide creation and organization.

mmhmm is a presentation app that takes your webcam feed and layers it on top of presentation slides. You control the look and feel of the screen. When you give a presentation on a live video call, mmhmm shares the webcam and images to your videoconferencing app as a “virtual camera.” You can also use mmhmm to record a lightweight video which saves to the cloud so your audience can watch anytime.