X-Ray itself is available under the New/Modified BSD License. Full text is below. X-Ray redistributes the following components: * LWJGL http://lwjgl.org/ This is also distributed under the the new/modified BSD license, though specific details can be found in COPYING-lwjgl.txt. * launch4j http://launch4j.sourceforge.net/ This is used for Windows EXE generation, and is available under a BSD license. It also appears to include code under the MIT license, and includes some binaries licensed under the GPL. See COPYING-launch4j.txt for more details on that. * SnakeYAML http://code.google.com/p/snakeyaml/ Available under the Apache License 2.0. See COPYING-snakeyaml.txt for more details on that. * log4j http://logging.apache.org/log4j/1.2/ Also available under the Apache License 2.0. See COPYING-log4j.txt for more details on that. * Various files from Minecraft's builtin texturepack http://www.minecraft.net/ Specifically: terrain.png, particles.png, art/kz.png, and misc/water.png Technically this redistribution is in violation of Mojang's stated "Do not distribute anything we've made" rule, but I'm pretty sure that this kind of usage would be acceptible regardless, especially given that the bundled texturepack is only used in extreme corner cases where the user's installed minecraft.jar can't be found on the drive. Plus, many other prominent community tools have been bundling terrain.png for some time now (INVedit, MCEdit, etc). Ah, the "everyone else was doing it" argument! Anyway, I will of course readily cease using the official texturepack in here if asked. * RegionFile.java and RegionFileCache.java, courtesy Jens Bergensten of Mojang http://mojang.com/2011/02/16/minecraft-save-file-format-in-beta-1-3/ They appear to be under a sort of generic public domain license. In general, the X-Ray sourcecode files here will list a copyright for both Vincent Vollers and CJ Kucera, though the actual distribution of code copyright would probably be more complicated than that. Please forgive any instances of code misattribution! ---- Copyright (c) 2010-2012, Vincent Vollers and Christopher J. Kucera All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the Minecraft X-Ray team nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL VINCENT VOLLERS OR CJ KUCERA BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.