The following sites maintain excellent guides to social science data archives and related resources

• ICPSR's List of Other Data Sites
   
• CISER's Guide to Internet Data Resources for Social Scientists
   
• Council of European Social Science Data Archives (CESSDA)
   
• NorthWestern University
   
• University of Toronto: Data Resources at the Map and Data Library
   
• World Wide Web virtual Library: Social Sciences Virtual Library
   
• Craig Mckie's Guide to Social Science Data Archives