Quandl has one mission: help users find the data they need, in the format they want. Fast. You can search for almost any keywords and immediately consume the data with the TARGIT Data Service. This connection is delivered as a built-in plugin, so all you need is the API key that can be found in the account page when you're signed in in Quandl.
Enter the name of the data source
The API key can be found on the account page when you have created an Account at Quandl.com
Data sources that can be used either as a trial or by paying a subscription to Quandl.
List of freely available data sets that you can extract information from.