High Quality Content by WIKIPEDIA articles! SeaMonkey is a free and open sourcecross-platform Internet suite. It is the continuation of the former Mozilla Application Suite, based on the same source code. Core Mozilla project source code is licensed under a disjunctive tri-license that gives the choice of one of the three following sets of licensing terms: Mozilla Public License, version 1.1 or later, GNU General Public License, version 2.0 or later, GNU Lesser General Public License, version 2.1 or later.