C code for any platform. [This is a gzipped tar file. Windoze may not recognize that fact, but, no, the file is not corrupted.]
Linux executable.(glibc version built using GCC).
Windows executable. (Built on linux using the mingw gcc cross-compiler.)
Each of these packages also contains the documentation.
Check here the current version number.
A Macintosh executable has been compiled by Andrew Trevorrow, the author of OzTeX. It is available from ftp://ctan.tug.org/tex-archive/systems/mac/oztex/oztth.sit. Please direct any queries about that version to him.