jfree-graph
The project encompasses a free to use graph library in java. It is released under the GNU LGPL license, so commercial use of the library is allowed. The library uses java 1.6, but modifications to use 1.5 should be minimal.
Metadata
Category: Collections
License: GNU Library or Lesser General Public License (LGPL)
Homepage: http://code.google.com/p/jfree-graph/
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