Here are some useful HR-related, regulatory body, media, association, and government web sites.

Association of Canadian Pension Management (ACPM)
Association canadienne des administrateurs de régimes de retraite (ACARR)

Canadian Association of Pension Supervisory Authorities (CAPSA)
Association canadienne des organismes de contrôle des régimes de retraite (ACOR)

Canadian Council for Human Resources Associations (CCHRA)
Conseil canadien des associations en ressources humaines (CCARH)

Canadian Institute of Chartered Accountants (CICA)
Institut Canadien des Comptables Agréés (ICCA)

Canadian Institute for Health Information (CIHI)
Institut canadien d'information sur la santé (ICIS)

Canadian Life and Health Insurance Association (CLHIA)
Association canadienne des compagnies d'assurances de personnes (ACCAP)

The Canadian Payroll Association (CPA)
L'association canadienne de la paie (ACP)

International Foundation of Employee Benefit Plans (IFEBP)
(English only)

Office of the Superintendent of Financial Institutions (OSFI)
Bureau du surintendant des institutions financières (BSIF)

Pension Investment Association of Canada (PIAC)
Association Canadienne des Gestionnaires de Fonds de Retraite (PIAC)

World at Work -- Canada
(formerly Canadian Compensation Association)

Government

Canada Benefits
Prestations du Canada

Canada Revenue Agency (CRA)
Agence de revenu du Canada (ADRC)

Finance Canada
Finances Canada

Government of Canada
Gouvernement du Canada

Health Canada
Santé Canada

Human Resources and Social Development Canada
Ressources Humaines et Développement Social

Régie des rentes du Québec (RRQ)
(English)

Human Statistics Canada
Statistique Canada

Provinces and Territories
Provinces et territoires