While simply pasting in generic user interface (UI) elements is the wrong way to complete any design, there are a few really good reasons for why designers should keep PSDs of UI kits handy.

For one, the best UI kits feature exemplary work that can become a great source of inspiration. Learning from the work of others is one of the best ways to grow as a designer. Secondly, if you haven’t done much UI design before, these kits serve as a proper starting point. Lastly, having high quality UI elements at your fingertips makes it easy to quickly build impressive mockups for clients while ideas are still fresh.

Clearly, there’s some real benefit to keeping these UI designs nearby, so we’ve done the dirty work for you and gathered our favorites together. Without further ado, I present to you this list of 13 high quality, free PSD UI kits for designers:

1. Slick Light UI Kit

2. UI Kit by Piotr Kwiatkowski

3. Black UI Kit

4. Breezy Dark UI Kit

5. Stylish User Interface Kit

6. Cloudy UI Kit

7. Mac App UI Kit

8. Dark Themed UI Set

9. Moonify UI

10. Blaubarry Ui Kit

11. 4 UI Kits by RepixDesign

12. Detailed UI Kit

13. CSS3 UI Kit

As always, if we missed your favorite free kit in our list, definitely share it in the comments below!

Check out our full Design and Dev channel for more inspiration!