Node's license follows: ==== Copyright Joyent, Inc. and other Node contributors. 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. ==== This license applies to all parts of Node that are not externally maintained libraries. The externally maintained libraries used by Node are: - v8, located at deps/v8. v8 is copyright Google, Inc, and released under a BSD license. - libev, located at deps/libev, and libeio, located at deps/libeio. libev and libeio are copyright Marc Alexander Lehmann, and dual-licensed under the MIT license and GPL2. - WAF build system, located at tools/waf. WAF is copyright Thomas Nagy, and released under the MIT license. - The SCONS build system, located at tools/scons. SCONS is copyright the SCONS Foundation and released under the MIT license. - C-Ares, an asynchronous DNS client, located at deps/c-ares. C-Ares is copyright the Massachusetts Institute of Technology, authored by Greg Hudson, Daniel Stenberg and others, and released under the MIT license. - Node, optionally, links to OpenSSL, it is located at deps/openssl. OpenSSL is cryptographic software written by Eric Young (firstname.lastname@example.org) to provide SSL/TLS encryption. OpenSSL is copyright The OpenSSL Project and released under the OpenSSL license. - tools/doctool/markdown.js is copyright 2009-2010 Dominic Baggott and Ash Berli and released under the MIT license. - HTTP Parser, located at deps/http_parser, is a small C library copyright Ryan Lienhart Dahl and released under the MIT license. - src/platform_darwin_proctitle.cc, has code taken from the Chromium project copyright Google Inc. and released under a BSD license. - tools/closure_linter is copyright The Closure Linter Authors and Google Inc. and released under the Apache License, version 2.0. - tools/cpplint.py is copyright Google Inc. and released under a BSD license. - lib/buffer_ieee754.js is copyright 2008 Fair Oaks Labs, Inc. and released under the New BSD license. - lib/punycode.js is copyright 2011 Mathias Bynens <http://mathiasbynens.be/> and released under the MIT license. - tools/gyp GYP is a meta-build system copyright 2009 Google Inc and licensed under the three clause BSD license. See tools/gyp/LICENSE. - deps/zlib copyright 1995-2010 Jean-loup Gailly and Mark Adler licensed under a permissive free software license. See deps/zlib/LICENSE. - deps/npm npm is a package manager program copyright 2009, 2010, 2011 Isaac Z. Schlueter and licensed under MIT. npm includes several subpackages MIT or Apache licenses, see deps/npm/LICENSE for more information. npm is included in the Node .msi and .pkg distributions but not in the Node binary itself.