We list the best free presentation software, to make it simple and easy to create professional presentations without a subscription to Microsoft PowerPoint. While PowerPoint is the market leader ...

There you can open it and edit it anywhere with a web browser or a copy of Office 2013. Additionally, there are free PowerPoint apps on Android, Windows Phone, iPad and iPhone.

Any presentation you work on in Keynote will automatically be saved as a .key file. When you want to share this with PowerPoint users you’ll first need to convert it to a .pptx file.