Loomio - Loomio helps groups of people make decisions together, online.

Pingo - Optimize images for the web quickly 🖼️⚡

PollUnit - Create and customize public or anonymous votings, surveys, free tables, idea collections or audio, video and photo contests.

Imakiku - Imakiku is an audience response system for real-time voting, posting comments, and surveying.

Mentimeter - a web-based polling tool for workshops, conferences & events

Presentii - Imagine a tool that lets you capture audience interest in your presentation content as you present.