1) Powerpoint online: Microsoft offers a web only free version of Powerpoint. You can use this free version to create and edit your presentations using the same familiar interface as the offline version of Powerpoint. Most premium features of the paid version are available for use. You can share your presentation with others and even collaborate online while creating and editing your presentation.
Powerpoint online is available free for personal use as part of Microsoft 365 online.
2) Google Slides
Sharing your presentation has never been easier thanks to Google Slides. All you have to do is go to Google Slides, then either create a fresh presentation from scratch or upload your presentation and then generate a link that you can share with whomever you want to see the PowerPoint presentation you have made.
Making new presentations in Google Slides can yield great results, because it gives you the option of adding not only photos and words to your presentation, but audio and video content as well. The best thing about Google Slides is that you can directly talk to your audience using SlidesQ&A.
Google Slides is a part of Google Docs, an all-encompassing online office suite that can replace just about any Microsoft Office program, including PowerPoint, to fulfill your computing needs even when you don’t have MS Office (Microsoft 365) installed on your computer.
Google Slides is free for personal use.
3) Zoho Show
Make your presentations from scratch using the Zoho interface, or upload an already existing PowerPoint presentation and then either touch it up or just share it with your collaborators.
Zoho Show is free for personal use.