I’m back with Free Flat UI Designs, you can download them for free. These will be wonderful in your library of coolness. User interface kits are in PSD Format with plenty of designs, styles and themes to choose from.
These flat UI kits are all 100% free, but make sure you check out the designers page and give them a like or share, or why not browser their site for more cool stuff, I think they have lots of awesome stuff there. A thank you to the designer is always welcomed.
Just scroll down, click the image or the text above the image you like and start downloading your favorite UI kit.