//AssetManager.as
// usage: AssetManager.getInstance.getAssetByName("MonaLisa");
package
{
    import flash.utils.describeType;
    import flash.utils.getDefinitionByName;

    public class AssetManager
    {

        [ Embed( source="/../assets/fonts/American Typewriter.ttf", 
                  fontName="AmericanT", 
                  mimeType="application/x-font-truetype" ) ]
        public static const FONT_AMERICA_T:String;      

        [ Embed( source="/../assets/library.swf", symbol="Square") ];
        private var Square:Class;

        [ Embed (source="/../assets/Mona_Lisa.jpg") ]
        private var MonaLisa:Class;

        private static var instance:AssetManager;

        public static function getInstance():AssetManager 
        {
            if (instance == null)
                instance = new AssetManager();
            return instance;
        }

        public function getAssetByName( name:String ):*
        {
            var className:String = describeType( this )[email protected]();
            var fullname:String = className + "_" + name;
            var ref:Object = getDefinitionByName( fullname );
            return new ref();
        }       

    }
}

Simple Asset Manager with Embed Style

Simple Asset Manager with Embed Style

ActionScript 3