qTip2 is actively developed over at the GitHub repository, updated frequently with the latest code developments and bug fixes.
Note: Since the branch is being constantly updated, don't be suprised if you run into some bugs, and make sure to report them!
The GPL is the first and foremost copyleft license, which means that derived works can only be distributed under the same license terms. Under this philosophy, the GPL grants the recipients of a
computer program the rights of the free software definition and uses copyleft to ensure the freedoms are preserved, even when the work is changed or added to. This is in distinction to permissive
free software licenses, of which the MIT licenses are the standard examples.
The MIT license
The MIT license grants you, free of charge, the ability to use, modify and basically whatever the hell you want to do with it under one simple condition:
you must include the lincese or a link to it within the qTip2 files! The MIT license is GPL compatible, meaning you can use it conjunction with other GPL
software your developing without worrying about license issues.
What you need to know
qTip2 is dual-licensed under the open source MIT and GPLv2 licenses. These licenses must be distributed with all scripts falling under their terms, either in file form, or a link to a copy in the header of the files. This is already done for you in the scripts headers, so if you're not too familiar with licensing don't worry about it!
So... that's it? Completely free?
If you have any questions regarding the license that aren't answered here or on the license pages, drop me a line at craig[at]craigsworks.com and we'll talk details.