Reveal.js - A framework for easily creating beautiful presentations using HTML
Microsoft PowerPoint Viewer - Microsoft PowerPoint Viewer is one of the powerful applications that allow you to access the familiar tools to create, edit, view, present, and share presentations in no time from any location.
Prezi - Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.
PPTX Viewer - PPTX Viewer is one of the lightweight applications that allows you to view, create, edit and share your presentation without facing any advertisement issue.
Google Slides - Create a new presentation and edit it with others at the same time — from your computer, phone or tablet. Free with a Google account.
Aspose.Slides for Cloud - Use cURL commands to create, manipulate, merge, split & convert PPT PPTX presentations & slides to PDF, XPS, TIFF, ODP, OTP, HTML & other formats.