Ember component libraries

I've come across a few Ember component libraries but don't see much activity in their repositories. This is raising some doubt as to whether I should use one in a brand new project.

Are people still using component libraries in new [Ember CLI] projects?

Example component libraries I've found:

• Ember Components
• Ember UI
• Ember Widgets

Any experience with any of these lately? Any new kids on the block?

Or are you creating your own components as required?