ExtJS: When Open Source is Not Open at All

"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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