Here is a list of popular Canadian US Denominated ETFs:

Title
ZMID-U.TO – BMO S&P US Mid Cap Index ETF USD
HUF-U.TO – Horizons Active Ultra-Short Term US Investment Grade Bond ETF
DLR-U.TO – Horizons U.S. Dollar Currency ETF
HXT-U.TO – Horizons S&P/TSX 60 Index ETF
HXS-U.TO – Horizons S&P 500 Index ETF
HMUS-U.NE – Horizons US Marijuana Index ETF