Alan Kay talks about Gezira, a library built with Nile (and the motivation for making Nile, althoug Nile is much more general purpose). There's a JS version of Nile/Gezira which was used for Brett Victor's demonstrations, which can be found here [1]

The main Nile compiler here is written in Maru, a programming language of Ian Piumata's which is another awesome project on it's own. It's essentially a Lisp where you can define how the evaluator behaves for a given type.[2] The version of Maru used is included in the Nile repo though. It can be built with GCC or MinGW. The compiler translates Nile to either Maru or C code.

There's a squeak version which can be found at [3]

And also a Haskell vector library which exposes a similar interface to Cairo, but is modeled as Gezira under the hood (used for purely functional image generation). Although this implementation is function based and doesn't really provide a proper streaming abstraction as provided by Nile. [4]

[1]: https://github.com/damelang/gezira/tree/master/js

[2]: http://piumarta.com/software/maru/

[3]: http://tinlizzie.org/updates/exploratory/packages/

[4]: https://hackage.haskell.org/package/Rasterific