I’ll start a living list of educational online resources to enrich your teaching. I’ll eventually make it into a more database-y look when I have time.
https://myfreebingocards.com
Create a bingo game, with customised titles etc
https://jeopardylabs.com
Create a jeopardy game for use as a teaching game
https://kahoot.com
Create an interactive quiz game that invites users to use their own devices to participate. Works via remote meetings too
https://slido.com
This one is more about meeting interactivity and polls, but it is interactive, has an app and a web interface, and can be embedded into a PowerPoint, delivered remotely
https://polleverywhere.com
Poll Everywhere is some good solid interactive poll software. Free, similar to Slido but perhaps a bit better. Slightly different implementation but very easy to use