The Toyota Echo hatchback which was around for two model years before being replaced by the Yaris is another, in 2004, 42,000 Echos were sold in Canada while about 4,000 were sold into the US.
The first gen Acura EL was based off an upscale Civic under a different model name (Honda Domani according to Wikipedia) in Japan, the second gen Acura EL was an upscale Honda Civic period, and the current Acura CSX is based off the JDM Honda Civic sedan. The CSX Type S is pure awesomeness.
Mazda in Canada does not have the unfortunate connection to Ford like in the US so that has probably helped with its strong sales. The Mazda 3 has consistently been number 3 in sales in Canada behind the Civic and Corolla.
Back in the 80s to early 90s there was the Nissan Micra, a tiny little hatchback in 3 or 5 door formats. Apparently it is going to make its return to Canada and quite possibly appear in the US positioned below the Versa.
What I don't get is why Scion never made it to Canada. They're finally coming this fall but I always wanted a 1.5L first gen Scion xB.