Give Me Geodata
Hans Hack's Gimme Geodata just might make it onto my bookmark list of mapping tools I use on a near daily basis (a very short list which currently consists of Leaflet, geojson.io and overpass turbo). Gimme Geodata is a very easy to use tool for quickly downloading OpenStreetMap boundary data. To use the tool you just need to click on an interactive map to indicate your area of interest.