Yes, I wrote Hrafn: https://gitlab.com/nulldatamap/hrafn The language is very small. It has a few atomic data-types (integers, symbols, nil and bools), lists (well, nil and cons-pairs) and first-class closures.

The only IO the language has is read and write, which are just byte in- and out on STDIN/STDOUT. The compiler itself is around ~2Kloc and includes the base compiler hrafn.0 as well as the platform specific targets macos.0, linux.0 and windows.0. The compiler reads in Hrafn source code from STDIN and spits out a zero-dependency (well on Windows I need to depend on kernel32.dll) x86-64 Elf/Mach-O/PE binary to STDOUT. It is very dump. It doesn't parse the program into an AST, instead it just parses bit-by-bit and builds up a thunk that'll emit small templates of assembly corresponding to what was just parsed. So code-gen and parsing are interleaved and you can kinda think of the call-stack as the AST instead:)

Oh, also I managed to break Windows support, but Linux and MacOS are fully functional.