This is an interpreter for the Anna language. Anna is a computer language with a C-like syntax, structural typing and LISP-style macros.
The Anna interpreter is working and only has a small number of glaring functionality holes, but the standard library is still a barren wasteland. After installing Anna, the documentation should be available in HTML format in /usr/local/share/doc/anna/index.html. You can also check out the various example files in the util, perf and tests directories to get a feel for how the language works.