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.

tutoit.io - Create an in-app measurable tutorial with a single click

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.

DebateArt.com - DebateArt is a unique and growing community committed to the idea of exchanging views and perspectives through debating.

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.

Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.