Web App Mapping Integration

I need a mapping system integrated into my web app to display user-generated locations.

Requirements:
- Select a mapping system: Google Maps, OpenStreetMap, or Mapbox.
- The map should be interactive and user-friendly.
- Users should be able to add and view locations.

Ideal Skills:
- Experience with web mapping APIs.
- Proficiency in front-end development.
- Familiarity with user-generated content integration.