I used withoutabox, worked fine. they dont charge but the festivals of course do. I think they have higher level plans though that they do charge for. It was almost a year ago now so i really dont remember a whole lot but it did go pretty smoothly.
Withoutaboxis an awesome site! You fill out a kinda profile for your films, and they find festivals all over the world that your film fits the criteria for, and then entries are paperless. They will send you lists of festivals that you can apply to. By using withoutabox, you're guaranteed not to run into any scam sites, as they thoroughally read into their partnership applications. My company is a partner, and we have had nothing but great help from them! I would definately recommend their services!