Review of Leaflet powered by the Slant community.
Ranked in these QuestionsQuestion Ranking
Pro Plugins are easy to develop
Pro Has a nice API
Feels much more modern than e.g. OpenLayers.
Pro Mobile friendly
Supports mobile-friendly jestures like pinch to zoom, dbl-tap, drag, fling, etc.
Pro Well structured and readable source code
Pro Very small
Weighing just about 33 KB of JS, it is pretty small without losing any useful features.