Ariuum - Online debate and discussion streaming platform
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.
roundtable.audio - Live audio chat rooms to discuss anything on the internet
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.
YEAY - QVC + Tumblr + Snapchat. Vertical video shopping.
Keynote - Keynote for Mac, iOS, and iCloud lets you make dazzling presentations. Anyone can collaborate — even on a PC. And it’s compatible with Apple Pencil.