I just got the ATS hello world to compile. I untared the ATS distribution ran .configure and make all then set my PATSHOME enviroment variable to the folder I untared to. Then added $PATSHOME/bin to PATH. After that running patscc -o hello hello.dats worked.
@Dennis do you prefer to link to the home page of the language like you do for GCC or the code repository like you do for a lot of esolangs? If the first, the ATS website is ats-lang.org/Home.html