Code that links to this license is, for the most part, free to be used without restriction. I would be grateful to hear about how it’s being used or how it’s helping you, although there’s no legal obligation for you to do so.
Officially, it’s a straight MIT license, which is short and sweet. You can use the code in whatever you want (both closed source and open source) in any part, including its entirety, and I’m not responsible for anything you do with it. You can take my code and sell it exactly as-is if you want, except that you need to link to this license.
Copyright (C) 2013 Nathan Wong (http://nathan.ca/) For the most up-to-date version of this license, please see http://nathan.ca/code/license 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.