Infolot
Infolot is an app used to consult the cadastral database of the province of Québec, which is produced by the Ministère de l'Énergie et des Ressources naturelles (MERN).
There are to ways to access this app: a free one and one with fees.
Some cadastral data can be bought using this app.
For more details, consult this Web site.
It is in French only.