It’s not an exact analogy since you can’t download vectors — or for that matter, upload your own designs — but the DIY Furniture Design Bank is pretty neat nonetheless, with instructions showing how to build small pieces of furniture.
I’ve got so many furniture designs going that I will never get to make, so I thought why not loan them out for others to see and use as they wish. Think of it as a seed bank. These are domestic scale furniture designs generally in the traditional mode, but modern in form within the restrictions of materials and skills. That sounds good. This is not exactly a how-to-do-it site, though that sort of information is included, but rather a site to show you the wide verity of forms these designs can take answering the same basic requirements. My take, anyway. This is straight forward stuff using mostly wood. Some projects are very easy, others not.