Géoboutique
Géoboutique is a purchase site for data belonging to the Ministère de l'Énergie et des Ressources naturelles (MERN). It contains a huge aerial imagery library, many orthophotographies and LiDAR data.
Consult
http://geoboutique.mern.gouv.qc.ca for more details.
Note: Thise site is in French only.