slsii

I'm impressed by the level of effort and thought that went in to Salesforce Lightning Design System (https://www.lightningdesignsystem.com). Are there other examples of comprehensive (enterprise) app UI/UX pattern libraries?

Zurb's Foundation for Apps is good, but seems to focus more on just scaffolding rather than the more complex interactions.

Google doesn't return anything useful, though perhaps I'm using the wrong terms.

Are they an valid form of consumer protectionism? Or are we experiencing a textbook example of the tragedy of the commons? Something in between?