 <p>There are many places to find interesting data online: The <a href="http://data.worldbank.org/" rel="nofollow">world bank</a> has released an extensive set of data you can download and use for free. You can also extract some of the structured data from wikipedia through the service <a href="http://dbpedia.org/About" rel="nofollow">DBpedia</a>. If you want to use more specific data from either corporate or governmental institutions (how much did your government spend last year? Where does the crimes find place?) check out Open Knowledge Foundations data repository at <a href="http://thedatahub.org/" rel="nofollow">The Data Hub</a>.</p>