Google Maps vs Leaflet vs MapKit JS

From a StackShare Community member: "We're a team of two starting to write a mobile app. The app will heavily rely on maps and this is where my partner and I are not seeing eye-to-eye. I would like to go with an open source solution like OpenStreetMap that is used by Apple & Foursquare. He would like to go with Google Maps since more apps use it and has better support (according to him). Mapbox is also an option but I don’t know much about it."

1. I would like to input a spreadsheet with names and associated addresses into a map program to; pinpoint all of the locations on a map. How can I do that? On which map? Are there field size limitations? All help would be appreciated.

2. There is a subdivision that is about one(1) mile by 3/4 mile in size. Is there a map program that would create the most efficient way to drive all of the streets in the subdivision without a lot of doubling back?