Padlet - Visual boards for organizing anything.
Pingo - Optimize images for the web quickly 🖼️⚡
Popplet - Popplet is the simplest application to capture and organize your idea.
Imakiku - Imakiku is an audience response system for real-time voting, posting comments, and surveying.
Quiver - Quiver is a notebook built for programmers.
Ideahunt.io - Ideahunt.io is a tool that is now available as Svava, it allows you to make every meeting successful, and provides you the features to conduct interactive meetings.