Lyket is the easiest and quickest way to engage your audience while maintaining their privacy. In just a few minutes you can add out-of-the-box like, clap and vote buttons to your website and start receiving feedback right away. No sign-up required!
Contra is a slick app for voicing your most honest opinions. It's pretty simple; you pose a two-sided question and get thoughtful responses and votes from people all around the world. Be careful though: it gets suuuuppper addicting because of the debate mechanism. I've personally spent a few too many hours on it, just trying to prove my point!