From Liège (BE), using StreetComplete/MapComplete/etc. to edit OSM POI such as free public ressources (give boxes, public bookcases, free shops, food banks,…), commons (bus stops, benches,…), vegetarian places, etc.
Contributions: https://hdyc.neis-one.org/?plicploc and heatmap: https://yosmhm.neis-one.org/?plicploc

Developing https://shareish.org solidarity open-source platform showing OSM free resources (e.g. public bookcases, solidarity fridges,…), FallingFruit, and adding user-based dynamic data on top (e.g. donation ; requests for help ; events).

Umap of walks/hiking: http://u.osmfr.org/m/1039462/

Organizing outdoor cartoparties/mapathon using StreetComplete/MapComplete/EveryDoor at University of Liège campuses: http://openuliegemap.montefiore.uliege.be/