PhoneGap is an open source implementation of open standards. That means developers and companies can use PhoneGap for mobile applications that are free, commercial, open source, or any combination of these. The PhoneGap project will always remain free and open source under an MIT license.
via phonegap.com
I love the spirit in which Open Source operate, share tools and productivity that can lead to greater ideas, and in the long run, change how technology develops and change our world.