SAOImage DS9 is composed of approximately 20 open sourcepackages, all of which are distributed under their own open source license agreements, usually GPL, LGPL, or BSD. In addition, several open source packages have been developed here at the Smithsonian Astrophysical Observatory, Cambridge, MA, USA and are distributed under the terms of the GNU General Public License as published by the Free Software Foundation. As long as you continue to adhere to the provisions of the licenses, you are free to distribute SAOImage DS9 along with your software.

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