Libre Office

LibreOffice

LibreOffice is a free and open-source office suite, a project of The Document Foundation. It was forked in 2010 from OpenOffice.org, which was an open-sourced version of the earlier StarOffice.
– alternative to Microsoft Office

Attention: Audio/video support depends on specific components installed on your operating system. In the case of Windows 10, it’s DirectShow codecs; and you are advised to install third-party codec packs in case DirectShow codec is not available. This is apparent when getting an error trying to import MP4 video files.
Download the K-Lite codec here.

Videos
LibreOffice Impress Lesson 1 – Custom Layout
LibreOffice Impress Lesson 2 – Working with Pages/Slides
LibreOffice Impress Lesson 3 – Write or Draw on a Slide During Presentation