Neko

Neko is an high-level dynamicly typed programming language. It can be used as an embedded scripting language. It has been designed to provide a common runtime for several different languages. Learning and using Neko is very easy. You can easily extend the language with C libraries. You can also write generators from your own language to Neko and then use the Neko Runtime to compile, run, and access existing libraries.

If you need to add a scripting language to your application, Neko provides one of the best tradeoff between simplicity, extensibility and speed.

Neko is also a good way for language designers to focus on design and reuse a fast and well-designed runtime, as well as existing libraries for accessing filesystem, network, databases, xml...