Startup Stash is a curated directory of resources and tools to help you build your startup. It includes 400 products in 40 categories, like for example: Idea Generation, Early users, Marketing, Raising Capital and Customer support. Each category consists of 10 handpicked resources and tools, all with their own detail page that displays some info about the product.
Scheme Flowcharts is a huge pack of layouts for UX prototyping. This toolkit consist 310+ flowcharts in 9 categories for Mobile & Web. All flowcharts carefully crafted and easy to customize. You can use Sketch Symbols and Styles for speed up your workflow.