Hi all, I've just uploaded language-cil [1], a library for manipulating a Common Intermediate Language (CIL) [2]. CIL is the lowest level language used by Microsoft .NET and Mono on Mac an Linux. With language-cil, you can construct an AST and pretty print it to concrete syntax. The assembler `ilasm`, can create a .exe file which can be run by Mono or .NET. The package is not finished, it only supports a subset of the full language, but it's already usable. For more information, as well as an example to quickly get started, see the github page [3]. Cheers, Tom Lokhorst [1]: http://hackage.haskell.org/package/language-cil [2]: http://en.wikipedia.org/wiki/Common_Intermediate_Language [3]: https://github.com/tomlokhorst/language-cil#readme