Canva

Canva provides a large selection of free and customizable presentation themes for PowerPoint presentations. You can select from thousands of professionally designed templates and customize them to meet your specific requirements. You can also submit your own photographs and use page and text animations. When you're finished, save your modifications and download your free presentation templates as many times as you want. With a simple click, you may download PowerPoint presentations or PDF files from your design.

Canva Free provides you with all of the essential tools you'll need to design on your own or with others. This features thousands of themes, millions of media files ranging from photographs to graphics and videos, and an easy-to-use editor to help you create whatever you need.

More free layouts are available on Canva's website. They provide thousands of gorgeous free layouts that you can easily customize for any occasion.

Website: https://www.canva.com/presentations/templates/