Well.ca is like an online drugstore – that only charges $3 for shipping within Canada! (For all those American readers: just so you know, this is like gold for us. We get charged obscene amounts by most companies for shipping.)
StyleNotes and Retail Me Not both have online purchase code listings – with ratings, so you can tell if they’re expired! (I prefer Retail Me Not – it’s fantastic, and there are a ton of listings – but StyleNotes is pretty good too)
Freebies Canada is a good resource for surefire Canadaian freebies; RedFlagDeals and Smart Canucks are both forums for Canadian freebies (with more listings than Freebies Canada, but they aren’t always as reliable)
Lastly, Sale Event appears to be the up-and-coming, but they don’t sell much yet. I’ll check on them in a few months, if I remember, and get back to you guys.