SmileWidget allows you to gather feedback from your website traffic by asking your visitor a simple question with 3 smiley faces as responses: HAPPY, SAD, and NEUTRAL. Your visitors then voice their opinion about your question.
It also allows them to answer a "Why?" question after that, and prompts them for their e-mail if they wish to be contacted.
While SmileWidget can serve as a powerful (and free) website feedback tool, by collecting e-mails it also functions as a lead generation machine.