The bMap jQuery Plugin allows you to quickly and easily add mapping to your website. It has been designed from the beginning to handle lots of markers, lots of layers, and custom marker icons. The plugin can manage a sidebar for you, one with a list of markers, one with a list of layers. The sidebars can be styled with CSS.
The internal Google object is exposed, so you can continue to use all of the power of the Google Maps API. You can also access the internals of the bMap object. The prerequisites of the plugin are jQuery and google maps. You will need to obtain your own Google API Key.

Il arrive souvent que les Google Maps fourmillent de points. Deux problèmes évidents se posent : l’information est confuse et le temps de chargement est trop long.
Maptimize est une application assez sympathique permettant de regrouper des points dans une Google Map.
Pour éviter une superposition et une surcharge de sa carte, Maptimize vous propose des rendus graphiques pertinents :