It's a Chinese Android ROM called MIUI, and they just published their Lock Screen APP which is sooooooo nice. Hope u guys love it. check it out and link is below image link.. since im new, u need to paste it on ur browser.(jsut forget about paste) APP link http://bigota.d.miui.com/miuiapp/mihome_1.2.apk its theme names might have some Chinese, but it wont make u harder to use it if u want to ask how many themes they have.... i just want to say i spent more than several minutes on scrolling its online locker themes and cant finish it.. and yeah all free to download. but it's only lock screen and u need to find a wallpaper by urself to suit it.