MyColorScreen to browse through the myriad of customized setups as inspiration. The site is extremely useful for sourcing applications specific to a certain UI tweak, such as this wonderfully uncluttered setup created with 5 apps/widgets... At the heart of this Android customization is designer August Foreman's quartet of poster prints, all part of his Circumference series. A rotation of all four wallpapers is available using MultiPicture Live Wallpaper (free), combined with Ultimate Custom Clock and Nova Launcher (both free) to further minimize the graphical hodgepodge of a stock Android setup. Only WidgetLocker Lockscreen requires a $2.99 purchase, but there are other free lockscreen apps out there (I use GO Locker's iPhone slide option. Here for full details and preview.