Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
Clearbit - Clearbit provides Business Intelligence APIs
Sli.do - Slido is the ultimate Q&A and polling platform for live and virtual meetings and events. It offers interactive Q&A, live polls and insights about your audience.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Mentimeter - a web-based polling tool for workshops, conferences & events
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.