Clay is designed to solve problems in building large systems.
Clay is as efficient as C. It features fast compiles, powerful meta-programming, and excellent support for modular programming. All of our software (at Clay Labs) is written in Clay.
If you're interested in checking out an extremely old version of Clay (circa 2011), see https://github.com/jckarter/clay. Clay has been rewritten several times since then. We plan to release the new version of Clay as open-source in the future.
Follow us on twitter to stay tuned.