Reveal.js - A framework for easily creating beautiful presentations using HTML
DigitalChalk - Online Training Software and Learning Management System (LMS)
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.
Workplace by Facebook - Connect everyone in your company and turn ideas into action.
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.
Moxtra - Moxtra is a multi layered, embeddable team collaboration solution.