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."
It's a bit like saying, "You can use this as open source so long as you use the software how we'd like you to use it. If you have any money, forget open source: pay us instead."… Read more