sourcemod/public/licenses/LICENSE.txt

SOURCEMOD LICENSE INFORMATION
VERSION: JUNE-13-2008
-----------------------------

SourceMod is licensed under the GNU General Public License, version 3.  

As a special exception, AlliedModders LLC gives you permission to link the code
of this program (as well as its derivative works) to "Half-Life 2," the "Source 
Engine," the "SourcePawn JIT," and any Game MODs that run on software by the 
Valve Corporation.  You must obey the GNU General Public License in all 
respects for all other code used. Additionally, AlliedModders LLC grants this 
exception to all derivative works.

As an additional special exception to the GNU General Public License 3.0, 
AlliedModders LLC permits dual-licensing of DERIVATIVE WORKS ONLY (that is, 
SourcePawn/SourceMod Plugins and SourceMod Extensions, or any software built 
from the SourceMod SDK or header files) under the GNU General Public License 
version 2 "or any higher version."  As such, you may choose for your derivative 
work(s) to be compatible with the GNU General Public License version 2 as long 
as it is also compatible with the GNU General Public License version 3, via the 
"or any higher version" clause.  This is intended for compatibility with other
software.

As a final exception to the above, any derivative works created prior to this 
date (July 31, 2007) may be exclusively licensed under the GNU General Public 
License version 2 (without an "or any higher version" clause) if and only if 
the work was already GNU General Public License 2.0 exclusive.  This clause is 
provided for backwards compatibility only.

A copy of the JIT License is available in JIT.txt.
A copy of the GNU General Public License 2.0 is available in GPLv2.txt.
A copy of the GNU General Public License 3.0 is available in GPLv3.txt.

SourcePawn is Copyright (C) 2006-2008 AlliedModders LLC.  All rights reserved.
SourceMod is Copyright (C) 2006-2008 AlliedModders LLC.  All rights reserved.
Pawn and SMALL are Copyright (C) 1997-2008 ITB CompuPhase.
Source is Copyright (C) Valve Corporation.
All trademarks are property of their respective owners in the US and other