CALCONIC_ - Build & add interactive calculators to your website! Choose from more than 50 premade calculators or build your own from scratch. No coding required. Free plan available. Zapier Integration. Publish Anywhere.
SlidesPPT - Beautiful free presentation templates for Google Slides
Publisheet - Publish your Excel sheets to the web as dynamic web applications with formula support.
Slidebean - Presentations that design themselves
uCalc - uCalc is a universal builder of forms and calculators.
Selfone - Free template for PowerPoint, Keynote and Google Slides