Vanilla Forums
Vanilla Forums is an open-source community forum software designed for ease of use and extensibility. Founded in Montreal, it powers thousands of community platforms worldwide, with a strong plugin ecosystem and modern design.
Aegir Hosting System
Aegir is an open-source hosting system for Drupal websites, created and maintained largely by Montreal-based developers. It enables sysadmins to provision, migrate, and manage large numbers of Drupal sites from a single control panel.