Volusia County maintains GIS layers in both Shapefile format as well as in SDE Enterprise Multi-User Geodatabases. These layers of data are available to the public for download as esri shapefiles and are viewable using esri ArcGIS Desktop software as well as with free GIS software such as QGIS or ArcGIS Explorer Desktop.
(Countywide Data) Shapefiles - All layers available here.
Google Earth KMZ files are available for some layers.
Countywide Aerial Photography - ways to view.