This is our second roundup of fresh professional gui sets that are available free of charge. Most of the kits below meet the necessary web requirements including current trends. So majority of them are made in a flat style. You will find components both for website and application designs that are spiced up with bright colors. Also there are sets that radiate neatness and accuracy of iOS7 style.
I hope you find something useful. Enjoy and Good Luck!
1. Flat UI Freebie by katrina radic
2. Lucent UI
3. Flat Style & iOS 7 Line Style UI Kit PSD
7. Simple UI Pack by Samuel James Oxley
12. Color UI Kit by Cüneyt ŞEN
13. small UI kit by Visualcreative
14.Zan UI Free UI Kit by Benz Lee
16. UI Flat Design Kit by Samir Timezguida
17. PINK UI KIT
18. 3 in 1 User Interface Elements Kit Part 2
19. Flat UI Kit by Wahib El Younssi