Kawa:

  wget ftp://ftp.gnu.org/pub/gnu/kawa/kawa-2.0.jar
  wget ftp://ftp.gnu.org/pub/gnu/kawa/kawa-2.0.jar.sig
  gpg --recv-key D269E756
  gpg --verify kawa-2.0.jar.sig

  echo '(format #t "Hello, world!\n")' > hello.scm
  # Not sure how to bundle up a scheme script with kawa
  # to a stand-alone jar...
  java -jar kawa-2.0.jar --main -C hello.scm 
  time java -cp kawa-2.0.jar:. hello
  Hello, world!

  real    0m0.284s
  user    0m0.296s
  sys     0m0.020s