Wolfram Alpha

While walking around the conference floor during SXSW recently, I happened across the Wolfram Alpha booth. Their long-term goal is to make all systematic knowledge immediately computable and accessible to everyone. Wolfram Alpha's goal is to deliver to you answers that are definitive. It has an amazing inventory of numbers and facts known in the world. It has an engine on top of that which allows it to make new calculated facts based on that already-known information.