there were some attempts to include multithreading into standard ml. john reppy's manticore project came quite far but wasn't fully implemented. currently myth

there were some attempts to include multithreading into standard ml. john reppy's manticore project came quite far but wasn't fully implemented. currently mythryl, a sml/nj derivative with c-flavored syntax, is about to get a full multithreading support. check out mythryl.org and the status updates on the mailing list.