I'm surprised one has mention this as it seems fairly obvious: kaggle.com consistently has new and very interesting datasets. Information is considered an asset, so often companies don't want to release that data (plus privacy concerns). Kaggle gives you data and they hope you solve business problems in with it in exchange.

I'm surprised one has not mentioned this, as it seems fairly obvious: http://www.kaggle.com consistently has new and very interesting datasets. Information is considered an asset, so often companies don't want to release that data (plus privacy concerns). Kaggle gives you data and they hope you solve business problems with it in exchange.