OpenStreetMap (ODbL/CC BY-SA)
OpenStreetMap is built by a community of mappers that contribute and maintain data about roads, trails, cafés, railway stations, and much more, all over the world.
Worldmapper (CC BY-NC-SA)
Worldmapper is a collection of world maps called cartograms, where territories are re-sized on each map according to the subject of interest.
B.C. Open Textbook Collection: Earth Sciences (Various CC Licences)
A collection of open textbooks relating to various topics in earth sciences.
B.C. Open Textbook Collection: Geography (Various CC Licences)
A collection of open textbooks relating to various topics in geography.
Geosciences LibreTexts Library (CC BY-NC-SA)
A collection of open textbooks, assignments, and other educational resources on the subject of geosciences.