Leo is Open Software and is distributed under the terms of the Python License. The gist of the license is that Leo is absolutely free, even for commercial use (including resale). There is no GNU-like "copyleft" restriction. The Open Source Initiative board has voted to certify the Python license as Open Source. This license is compatible with the GPL.

Copyright (c) 1997-2002 by Edward K. Ream. All Rights Reserved.

Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Leo or Edward K. Ream not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission.

DISCLAIMER OF WARRANTIES

EDWARD K. REAM (REAM) SPECIFICALLY DISCLAIMS ALL WARRANTIES, EXPRESSED OR IMPLIED, WITH RESPECT TO THIS COMPUTER SOFTWARE, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL REAM BE LIABLE FOR ANY LOSS OF PROFIT OR ANY COMMERCIAL DAMAGE, INCLUDING BUT NOT LIMITED TO SPECIAL, INCIDENTAL, CONSEQUENTIAL OR OTHER DAMAGES.