This license applies to all parts of Node that are not externally maintained libraries. The externally maintained libraries used by Node are: - v8, located under deps/v8, which is copyrighted by the Google, Inc. v8 has an MIT license. - libev, located under deps/libev, and libeio, located at deps/libeio. This code is copyrighted by Marc Alexander Lehmann. Both are dually licensed under MIT and GPL2. - JSMin JavaScript minifier, located at tools/jsmin.py. This code is copyrighted by Douglas Crockford and Baruch Even and has an MIT license. - parseUri, a URI parser, is located in lib/http.js. This is just a small snippit. It is copyrighted 2007 by Steven Levithan and released under an MIT license. - WAF build system, located at tools/waf. Copyrighted Thomas Nagy. Released under an MIT license. - The SCONS build system, located at tools/scons. Copyrighted by the SCONS Foundation. Released under an MIT license. - UDNS, an asynchronous DNS client, located at deps/udns. Copyrighted by Michael Tokarev . Released under the GNU Lesser General Public License version 2.1. Other external libraries are my own and all use the same license as Node. Node's license follows: Copyright 2009, Ryan Lienhart Dahl. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.