Skeleton Systems builds libraries for other companies. You focus on your API and Skeleton Systems will build language-specific packages on top of it. Initially, they offer Python, JavaScript, Go, C#, and Rust.
SkeletonUI is a ProtoPie component library containing all the common components you need to build advanced prototypes. SkeletonUI will speed up your prototyping whilst giving you the ability to learn how to build components of your own. It's fully skinnable, flexible and customisable. Start building advanced prototypes in minutes.