smalltalk-mode is the emacs editing mode for GNU smalltalk. Attached is
the version copied verbatim from GNU smalltalk current git HEAD, last
commit is:
commit 8141da457870e24b0e04684213637b7c4435a2a5
Author: Wilfred Hughes <me@wilfred.me.uk>
Date:   Wed Nov 29 21:22:34 2017 +0000

GNU smalltalk itself is copyrighted by FSF, so I think it is qualified
to be included in the ELPA. If the format need changing please let me
know.