Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
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.
Rust - A safe, concurrent, practical language
Mentimeter - a web-based polling tool for workshops, conferences & events
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible