Slidebean - Presentations that design themselves
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
SlidesPPT - Beautiful free presentation templates for Google Slides
Event Hunt - Startups and Tech Events Curated By Locals
Slides - Slides is a place for creating, presenting and sharing presentations. The Slides editor is available right in your browser. Unlike traditional presentation software, like PowerPoint, there's no need to download anything.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets