OpenMapTiles.org
Open-source maps made for self-hosting
Leaflet vs. OpenLayers 3
Which is the better client-side JavaScript mapping library?
OpenLayers vs. Leaflet
use cases to show how maps could be build with both Openlayers and Leaflet, and discuss what criteria could be to choose either
OpenLayers
A high-performance, feature-packed library for all your mapping needs.
Leaflet Quick Start Guide
an open-source JavaScript library for mobile-friendly interactive maps
Frameworks (OSM)
Libraries, also known as frameworks, components, modules, or software development kits (SDKs), contain reusable code that helps developers integrate OpenStreetMap into their websites or software applications without reinventing the wheel.