Theme Sites. These are of course thematic, which will be helpful on what theme you want to use in a page. Scrapbooking is like Wordpress. If you are making a website powered by Wordpress, you will look for nice themes that you can work on instead creating your own. It should be appropriate in the long run as you post and update it. In scrapbooking, templates will stick for a long time after some time of adding all the elements, and it will be the basis of the overall look that you can't change. Photo Sharing Sites. These sites are both theme and group sites at the same time. Photo sharing is mostly their goal, but I have seen scrappers post their layouts or projects. So you will get templates or their ideas as well.
Crafts Sites. For a broader category, craft sites are the next best places to find templates. This is broad in a sense that they have listed sites for different types of arts and crafts like beadworks, candle making, and ceramics. Not all these do_it_yourself sites can literally hand out free templates, but will give you enough inspiration and idea to creating one. But it is best to browse on categories like drawing, gifts, paper crafts, patterns, or rubber stamping. Scrapbooking is also under this category.