Here’s one little kit that is light, clean, simple and colorful. It is a nice set of user interface design elements, including a knob for volume, previous and next buttons, a search input field, different states for buttons, a colorful slider, a drop-down menu with icons and labels for messages, comments, friends, photos and settings. The file also includes toggles with lighting, and variations of radio buttons. The file is free and easily editable in Photoshop.