Photoshop script that exports all groups to individual png files. Credits to http://www.damienvanholten.com/blog/export-groups-to-files-photoshop/

ps-export-groups-to-files.jsx

#target photoshop
function main() {
  if (!documents.length) return;
  var doc = activeDocument;
  var oldPath = activeDocument.path;
  for (var a = 0; a < doc.layerSets.length; a++) {
    activeDocument.activeLayer = activeDocument.layers.getByName(doc.layerSets[a].name);
    dupLayers();
    activeDocument.mergeVisibleLayers();
    activeDocument.trim(TrimType.TRANSPARENT, true, true, true, true);
    var saveFile = File(oldPath + "/" + doc.layerSets[a].name + ".png");
    SavePNG(saveFile);
    app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
  }
}
main();

function dupLayers() {
  var desc143 = new ActionDescriptor();
  var ref73 = new ActionReference();
  ref73.putClass(charIDToTypeID('Dcmn'));
  desc143.putReference(charIDToTypeID('null'), ref73);
  desc143.putString(charIDToTypeID('Nm  '), activeDocument.activeLayer.name);
  var ref74 = new ActionReference();
  ref74.putEnumerated(charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt'));
  desc143.putReference(charIDToTypeID('Usng'), ref74);
  executeAction(charIDToTypeID('Mk  '), desc143, DialogModes.NO);
};

function SavePNG(saveFile) {
  var pngOpts = new ExportOptionsSaveForWeb;
  pngOpts.format = SaveDocumentType.PNG
  pngOpts.PNG8 = false;
  pngOpts.transparency = true;
  pngOpts.interlaced = false;
  pngOpts.quality = 100;
  activeDocument.exportDocument(new File(saveFile), ExportType.SAVEFORWEB, pngOpts);
}