You can search across all government departments federal departments and agencies as well as provincial, territorial and municipal governments. There is a Departments and Agencies link, and the A to Z Index offers a keyword search to programmes and services. 

A recent development on Departmental sites is the inclusion of a "Proactive Disclosure" page, which outlines travel and hospitality expenses, disclosure of contracts, grants and awards. 

The About Canada page includes links to Departments and Agencies, Structure of the Canadian Government, Commissions of Inquiry and more. 

In addition to Department web sites, the government has been creating Portals which bring together information from across federal and provincial sources, and non-governmental organizations as well.