Patrice Dumas wrote:
Hello, In TeX Live there are at least 2 licenses with the obligation to send modifications: * This is dvips, a freely redistributable PostScript driver * for dvi files. It is (C) Copyright 1986-2004 by Tomas Rokicki. * You may modify and use this program to your heart's content, * so long as you send modifications to Tomas Rokicki. It can * be included in any distribution, commercial or otherwise, so * long as the banner string defined below is not modified (except * for the version number) and this banner is printed on program * invocation, or can be printed on program invocation with the -? * option. For makeindex there is a rather classical license with: "All modified versions should be reported back to the author."
A requirement to send modifications to anybody is non-free. A request to do so as in the Academic Free License is not.
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