UI design is indeed one of the most important aspect in web designing as well as developing. The importance is mainly because this is the user end thing no one knows how the coding is being done they like what they see which put extra emphasis on designer to come up with unique design and color combinations. Designer then act as a true artist with a canvas wide open, all he can come up with immaculate canvas prints by distributing colors in a perfect way.
Considering the importance of UI, I have compiled a list of very useful and most importantly free UI PSDs for all web developers who don’t want to waste their time on coming up with new ideas. These UIs are new latest and available in complete layers. So, I would say if you have a quick project to finish then download any of these UIs and do the coding finish the task and fill the pocket. I hope you like the effort.