VMD is Copyright © 1995-1999 Theoretical Biophysics Group and the Board of Trustees of the University of Illinois
Portions of this code are copyright © 1997-1998 Andrew Dalke.
The terms for using, copying, modifying, and distributing VMD are
specified by the VMD License. The license agreement is distributed
with VMD in the file LICENSE. If for any reason you do not have this
file in your distribution, it can be downloaded from
Please take a few minutes to fill out a registration form at
http://www.ks.uiuc.edu/Research/vmd/VMDregistration.html if you are going to use VMD.
Some of the code and executables used by VMD have different restrictions. They are:
1) STRIDE, the program used for secondary structure calculation, is free to both academic and commercial sites provided that STRIDE will not be a part of a package sold for money. The use of STRIDE in commercial packages is not allowed without a prior written commercial license agreement. See http://www.embl-heidelberg.de/argos/stride/stride_info.html
2) The source code for SURF is copyrighted by the original author, Amitabh Varshney, and the University of North Carolina at Chapel Hill. Permission to use, copy, modify, and distribute this software and its documentation for educational, research, and non-profit purposes is hereby granted, provided this notice, all the source files, and the name(s) of the original author(s) appear in all such copies.
BECAUSE THE CODE IS PROVIDED FREE OF CHARGE, IT IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED.
This software was developed and is made available for public use with the support of the National Institutes of Health, National Center for Research Resources under grant RR02170.
See ftp://ftp.cs.unc.edu/pub/projects/GRIP/SURF/surf.tar.Z .
3) The perl script url_get, was written by Jack Lund at the University of Texas as Austin. There appear to be no restrictions on its use.
4) Some parts of the GNU C++ class library are used in VMD, including the String and Regex classes. As per the GNU General Public License v. 2, the modified code is available as part of the general VMD source distribution and may be freely used and altered.