Nawvel - Nawvel is a handy-dandy library of tried, tested & curated resources.
SlidesPPT - Beautiful free presentation templates for Google Slides
Makerbook - A directory of the best free resources for creatives
Slides - Slides is a place for creating, presenting and sharing presentations. The Slides editor is available right in your browser. Unlike traditional presentation software, like PowerPoint, there's no need to download anything.
The Starter Kit - Curated resources for web developers and visual designers
Templates by 24Slides - The world’s best library of free presentation templates.