Poll Everywhere replaces expensive proprietary audience response hardware with standard web technology. It's the easiest way to gather live responses in any venue: conferences, presentations, classrooms, radio, tv, print — anywhere. It can help you to raise money by letting people pledge via text messaging. Its simplicity and flexibility are earning rave reviews.
yesnot.eu a site that discusses politics, business, culture, the law, and also throws in some stock charting and technical analysis. Based on users choices, totaly free.