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ExtJS: When Open Source is Not Open at All

By Matt Asay

“I was really excited to hear about ExtJS the other day. It was
billed as an open-source JavaScript framework for building web
applications. Great! I went to the company’s website and learned
that it’s actually dual-licensed. Even better! Maximum licensing
flexibility.

“But then I went to the company’s licensing page and things got
murky really fast. It turns out that the ExtJS won’t allow you to
use Ext under its LGPL (3.0) license ‘[i]f you plan to distribute
Ext in a product that will be packaged or sold as a software
development library, toolkit or plug-in-based framework…'”

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