Help to improve the OpenStreetMap with StreetComplete!
This app finds incomplete and extendable data in your vicinity and displays it on a map as markers. Each of those is solvable by answering a simple question to complete the info on site.
The info you enter is then directly added to the OpenStreetMap in your name, without the need to use another editor.
Hijacking the thread:
You are all welcome on [email protected] to discuss anyting OpenStreetMap-related
Also have a look to https://mapcomplete.osm.be - this one works on mobile and desktop and has many thematic maps (e.g. one for shops, one for cycling stuff, one for toilets) and you can improve the data there as well + add images.