Open Secrets -- The Center for Responsive Politics is the nation's premier research group tracking money in U.S. politics and its effect on elections and public policy. Nonpartisan, independent and nonprofit, the organization aims to create a more educated voter, an involved citizenry and a more transparent and responsive government
Sunlight Foundation -- A national, nonpartisan, nonprofit organization that uses thetools of civic tech, open data, policy analysis and journalism to make our government and politics more accountable and transparent to all.
Policy Agenda Project -- Collects and organizes data from various archived sources to trace changes in the national policy agenda and public policy outcomes since the Second World War.