Poll Everywhere

This is a great polling tool that is free for k-12 basic and up to 40 participants. Premium requires payment. What I like the most about this tool is that it allows teachers to text polls for free to their students.

Kahootit

A game based response system using their own mobile device

Socrative (also for iPad)

Socrative lets teachers engage and assess their students with educational activities on tablets, laptops and smartphones. Through the use of real time questioning, instant result aggregation and visualization, teachers can gauge the whole class’ current level of understanding. Socrative saves teachers time so the class can further collaborate, discuss, extend and grow as a community of learners.

AnswerGarden (also for iPad)

AnswerGarden is a new minimalistic feedback tool. Plant a question and invite participants to your AnswerGarden. Their answers will instantly form a growing word cloud! Use it for real time audience participation, online brainstorming and classroom feedback. A digital scribble space.