https://www.ontariouniversitiesinfo.ca/
This is an excellent site to find programs that are offered at the Ontario universities. Also has links to all the universities and specific information about their residences and scholarship information. You will need a PIN number to apply to an Ontario university.
www.ouac.on.ca/
To apply to an Ontario University, use this URL and click on Undergraduate Applications. Remember that you will need your PIN number, available in Student Services later in the fall.