GeoServer (Canadian GIS use)

QGIS is the leading free and open-source desktop GIS application. Canadian government agencies, universities, and environmental organizations are among the world's largest QGIS user communities. Natural Resources Canada, Parks Canada, and multiple provincial mapping agencies have contributed data, plugins, and development.

Ruby payment abstraction library used by ecommerce applications.

A multimodal journey-planning engine widely used with Canadian public transit data and open standards.

A toolchain for producing self-hosted vector map tiles from OpenStreetMap and other open data.