Canva.com offers high quality and most importantly beautiful presentation templates for free.
Head over to the site and you shall find presentation templates, poster designs, social media posts and tons of graphics available for free, even Instagram photos and videos, but if you need to download them, you’ll need an Instagram video downloader.
Few screenshots of templates:
You can customize them with free elements, also they provide paid themes and elements to offer even more quality. We personally used canva.com to create our pitch deck.