If you aren't entirely sure what you want to eat or you want to have a good selection of different outlets to choose from, have a look through these websites and you're spoilt for choice. They're also very useful if you want to order according to what part of Dubai you live in. Just choose the area and they'll give you a stack of options around you:
If you want to order your delivery straight from the outlet your food is coming from, we've put a few options for you below, covering all sorts of cuisines. If there are any outlets not here that you know of, please let us know and we'll be delighted to do the research and add the information for yourself and others to see. We can't guarantee they will deliver to your area, so would advise using the above links if you want to save time hunting the one that will deliver to you.