Inventory of Federal Organizations and Interests Provides a comprehensive listing of federal organizations and interests, which can be grouped by various categories.

Information about Programs and Information Holdings  (Treasury Board of Canada Secretariat) 

All government institutions subject to the Access to Information Act and the Privacy Act publish an inventory of their information holdings as well as relevant details about personal information under their control. The following information can assist you in making an access to information or personal information request, or in exercising your privacy rights.

Government Contacts (Government of Canada)
links to telephone numbers, web sites, and other information for Canadian government officials.

Departments and Agencies (Service Canada)
Provides links to all Canadian federal government agencies and departments.