License.txt

Unless otherwise specified by a header comment in an individual 
source file, the software in the Loyc project (and also LLLPG)
are released under the terms of the GNU Lesser General Public 
license version 2.1, or, at your option, any future version. 
Commercial uses of Loyc are welcome, and, as the license explains (in 
a rather muddy way), you do not have to release any source code of 
any products that merely use and depend on Loyc code. However, 
changes to Loyc DLLs themselves require you to provide source code 
of the changes to your users.


                  GNU LESSER GENERAL PUBLIC LICENSE
                       Version 2.1, February 1999

 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

[This is the first released version of the Lesser GPL.  It also counts
 as the successor of the GNU Library Public License, version 2, hence
 the version number 2.1.]

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                  GNU LESSER GENERAL PUBLIC LICENSE
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                     END OF TERMS AND CONDITIONS

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That's all there is to it!