A good thing when you're playing a free flash no download slots machine version of your favorite game is that you can play anywhere there is a computer hooked to the Internet. It also keeps you from filling up your hard drive with many different casinos software.
Not every online casino offers a no download version of their software, so you would usually need to search around for your best options.

Here is proposes you the famous Moonshine's slots machine, playable for free or real.