

- Google Slides Free and quite convenient. Works in the browser and has mobile apps. However, this is a cloud service, so if you need a completely offline experience, it will not work.
- OnlyOffice Presentation The free part of OnlyOffice includes a presentation editor. Can be used offline in a mobile app or desktop. The interface is more modern and convenient than Impress. Partially FOSS (client is open), you can disable the cloud.
- Calligra Stage Part of Calligra Suite is a free office suite with a presentation editor. There are versions for Linux, Windows, but there are no official mobile clients. The interface may seem unusual, but the functionality is decent.
- WPS Office (free version) Free office with presentation support. The interface is similar to MS Office, convenient and modern. Not fully FOSS, but free and works offline.
- Deckset (for macOS, paid) A very convenient tool for creating presentations based on Markdown. There is no free alternative on Android, but this is an example of the approach.
- Marp Markdown-based presentations. Free, cross-platform (there is an Electron version). It requires a little getting used to Markdown, but it is very flexible and convenient for those who like the text approach.