Simple Poll - The easiest way to create polls in Slack
Pingo - Optimize images for the web quickly 🖼️⚡
GitHub Polls - Polls for GitHub issues and readme
Imakiku - Imakiku is an audience response system for real-time voting, posting comments, and surveying.
Curious Polls - Answer a question once a day for the chance to win £100/$100
Blooket - Blooket is an interesting application that provides you with a wide range of features to create activities for class engagement.