This is a massive roundup of beautiful, free UI kits from all over the Web. They can be used to design and mock-up web, app and software user interfaces. Before using a UI kit from this list, please do read its license/terms of use.

1. Milk UI Kit Freebie

Milk UI Kit Freebie

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2. Transparent UI Kit

Transparent UI Kit

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3. Blugraphic Dark UI Kit

Blugraphic Dark UI Kit

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4. Clean UI Kit

Clean UI Kit

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5. Media Black UI Kit (PSD)

Media Black UI Kit (PSD)

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6. Silky Light UI

Silky Light UI

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7. Dark Web and Apps UI Kit

Dark Web and Apps UI Kit

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8. Hanna UI Kit

Hanna UI Kit

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9. Midnight UI Kit PSD

Midnight UI Kit PSD

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10. Cloudy UI kit

Cloudy UI kit

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11. Black UI Kit

Black UI Kit

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12. Clean and Usable UI Kit

Clean and Usable UI Kit

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13. Plush UI Toggles PSD

Plush UI Toggles PSD

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14. Clean UI Kit PSD

Clean UI Kit PSD

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15. Blaubarry UI Kit

Blaubarry UI Kit

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16. Mega Web Elements UI Kit

Mega Web Elements UI Kit

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17. Mega-UI Pack 1

Mega-UI Pack 1

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18. Web UI Set

Web UI Set

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19. Dark UI Kit (Free PSD)

Dark UI Kit (Free PSD)

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20. Moonify UI

Moonify UI

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21. Hand Drawn UI Kit

Hand Drawn UI Kit

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22. Cosmic UI Kit

Cosmic UI Kit

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23. Stylish User Interface Kit (PSD)

Stylish User Interface Kit (PSD)

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24. Apple Styled UI Elements

Apple Styled UI Elements

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25. Dark Bionic

Dark Bionic

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26. Chutzpah UI Design Kit

Chutzpah UI Design Kit

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27. Dark UI Kit (PSD)

Dark UI Kit (PSD)

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28. Web UI Elements Kit

Web UI Elements Kit

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29. UI Resource

UI Resource

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30. Magico UI Kit (PSD)

Magico UI Kit (PSD)

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31. Butterscotch UI Kit

Butterscotch UI Kit

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32. Minion UI

Minion UI

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33. "Pizza" UI Kit

"Pizza" UI Kit

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34. Blue UI Touch Kit

Blue UI Touch Kit

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35. White UI Kit Freebie

White UI Kit Freebie

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36. Free Dark Gold UI Kit

Free Dark Gold UI Kit

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37. Fresh UI Kit

Fresh UI Kit

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38. Orange UI Kit (Icon Deposit)

Orange UI Kit (Icon Deposit)

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39. Soft UI Kit

Soft UI Kit

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40. Minimize UI Kit – Free PSD

Minimize UI Kit - Free PSD

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41. Sleek UI Elements

Sleek UI Elements

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42. Electric UI Kit

Electric UI Kit

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43. Transparent Glass UI

Transparent Glass UI

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44. Colorful UI

Colorful UI

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45. Hendricks UI Kit

Hendricks UI Kit

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46. Creamy UI Kit

Creamy UI Kit

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47. Orange UI Kit

Orange UI Kit

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48. UI Kit – Milky (PSD)

UI Kit - Milky (PSD)

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49. Soft Touch UI Kit

Soft Touch UI Kit

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50. Free PSD: iTunes Inspired UI Kit

Free PSD: iTunes Inspired UI Kit

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What’s your favorite UI kit? Have you used any of the UI kits above in your design work? Do you know of other UI kits that should be on this list? Please share your thoughts (and relevant links) in the comments.

Author:

Jacob Gube is the co-founder and a managing editor of Design Instruct. He's a web developer, and also the owner of Six Revisions. Follow Jacob on Twitter: @sixrevisions