zooming

Modest Maps

Modest Maps is a small Javascript library for interactive tile-based maps that can display maps from external sources (e.g. OpenStreetMap, but not commercial layers like Google Maps), enable panning and zooming, and track the position of points based on XML data. It is designed to be lightweight and offer a minimal set of features, and therefore has less functionality than Leaflet, a similar tool.

OpenZoom

The OpenZoom SDK is a free and open source toolkit for Flash for developing Zoomable User Interfaces (ZUIs) for high-resolution images.