From https://github.com/mtoyoda/sl/blob/master/LICENSE the license states: Copyright 1993,1998,2014 Toyoda Masashi (mtoyoda@acm.org) Everyone is permitted to do anything on this program including copying, modifying, and improving, unless you try to pretend that you wrote it. i.e., the above copyright notice has to appear in all copies. THE AUTHOR DISCLAIMS ANY RESPONSIBILITY WITH REGARD TO THIS SOFTWARE. If fits in the FREE-MISC license group, can be added to it? IMHO (and IANAL) respects the GNU philosophy
It doesn't allow distribution of modified versions.
(In reply to Ulrich Müller from comment #1) > It doesn't allow distribution of modified versions. I filed a bug upstream https://github.com/mtoyoda/sl/issues/52
(In reply to Ulrich Müller from comment #1) > It doesn't allow distribution of modified versions. Author confirmed that this license allows distribution of modified code. see https://github.com/mtoyoda/sl/issues/52#issuecomment-294778695
I have committed a new license "Toyoda" and added it to MISC-FREE. I have also updated LICENSE of the package. Thanks for reporting!