The Wall Street Journal hosted 100 developers at its first-ever Data Transparency Weekend April 13 to 15, 2012 at New York University School of Law. Participants formed teams to work on free Web tools that promote data transparency. Visit our site on Hacker League to find team proposals and more.

The Data Transparency Weekend is an outgrowth of the Journal's "What They Know" series, which documented the tracking of data online. You may find more information on that work here.

Contact information is available at: datatransparency.wsj.com/