Explain Everything - Explain Everything is an easy-to-use design, screencasting, and interactive whiteboard tool that...

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.

Microsoft Whiteboard - The canvas where ideas, content, & people come together.

Reveal.js - A framework for easily creating beautiful presentations using HTML

Conceptboard - Instant Whiteboards for Teams & Projects

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.