What’s seen above (clockwise from top)

the calendar is called Rainlendarskin; all the folders/taskbar are affected by Windows Blind, the gray and olive-green skin is by Amaeli; mac-looking taskbar on the bottom is actually a Windows based Objectdock; Winamp skin; finally the wallpaper is by Grimgor. Other icons, cursors, boot screens, foobar themes, and whatever else you might need can be found at customize.org.