http://www.geographynetwork.ca/data/freedownload.html
The Geography Network Canada is an on-line resource for finding and sharing Canadian geographic content, including maps and data from many of our country’s leading providers.
Geogaphy Network Canada data services are published using either the ArcXML protocol employed by ESRI’s ArcIMS software or the Web Map Server (WMS) protocol published by the Open GIS Consortium (OGC).
Click on the link above to view data from Nova Scotia, Manitoba, New Brunswick and Ontario. Geogaphy Network Canada data can be downloaded using ArcIMS Data Download Extension (DDE).