matplotlib

Description:
matplotlib strives to produce publication quality 2D graphics for interactive graphing, scientific publishing, user interface development and web application servers targeting multiple user interfaces and hardcopy output formats. There is a ‘pylab’ mode which emulates matlab graphics.
Site:
matplotlib.org
Reference:
    1. Hunter Matplotlib: A 2D graphics environment Comput. Sci. Eng., Vol. 9, 90-95, 2007
License:

GNU Lesser General Public License version 2.1

LICENSE included in the distribution:

1. This LICENSE AGREEMENT is between the Matplotlib Development Team (“MDT”),
   and the Individual or Organization (“Licensee”) accessing and otherwise using
   matplotlib software in source or binary form and its associated documentation.
2. Subject to the terms and conditions of this License Agreement, MDT hereby
   grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
   analyze, test, perform and/or display publicly, prepare derivative works,
   distribute, and otherwise use matplotlib 1.5.1 alone or in any derivative
   version, provided, however, that MDT’s License Agreement and MDT’s notice of
   copyright, i.e., “Copyright (c) 2012-2013 Matplotlib Development Team;
   All Rights Reserved” are retained in matplotlib 1.5.1 alone or in any derivative
   version prepared by Licensee.
3. In the event Licensee prepares a derivative work that is based on or
   incorporates matplotlib 1.5.1 or any part thereof, and wants to make the
   derivative work available to others as provided herein, then Licensee hereby
   agrees to include in any such work a brief summary of the changes made to matplotlib 1.5.1.
4. MDT is making matplotlib 1.5.1 available to Licensee on an “AS IS” basis.
   MDT MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED. BY WAY OF EXAMPLE,
   BUT NOT LIMITATION, MDT MAKES NO AND DISCLAIMS ANY REPRESENTATION OR WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF
   MATPLOTLIB 1.5.1 WILL NOT INFRINGE ANY THIRD PARTY RIGHTS.
5. MDT SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF MATPLOTLIB 1.5.1
   FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF MODIFYING,
   DISTRIBUTING, OR OTHERWISE USING MATPLOTLIB 1.5.1, OR ANY DERIVATIVE THEREOF,
   EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
6. This License Agreement will automatically terminate upon a material breach of its
   terms and conditions.
7. Nothing in this License Agreement shall be deemed to create any relationship of agency,
   partnership, or joint venture between MDT and Licensee. This License Agreement
   does not grant permission to use MDT trademarks or trade name in a trademark sense
   to endorse or promote products or services of Licensee, or any third party.
8. By copying, installing or otherwise using matplotlib 1.5.1, Licensee agrees to
   be bound by the terms and conditions of this License Agreement.