From Liège (BE), using StreetComplete/MapComplete/etc. to edit OSM free public ressources (give boxes, public bookcases, free shops, food banks,…), vegetarian places, etc. Contributions: https://hdyc.neis-one.org/?plicploc

Developing https://shareish.org solidarity open-source platform relying on OSM and adding user-based dynamic data on top (e.g. donation / requests for help / events).