BossPaper is described as 'wallpapers manager for your jailbroken iPhone or iPod Touch that uses very little processor or memory. You can set wallpapers for 1st-gen or 2nd-gen devices which don't support wallpapers in iOS 4, or rotate wallpapers as a slideshow'. There are seven alternatives to BossPaper for iPhone and iPad. The best alternative is Winterboard, which is free. Other great apps like BossPaper are Lockinfo (Paid), Springtomize (Paid), MyOS (Paid) and Dreamboard (Free).
Give your iPhone or iPod Touch a graphical overhaul! WinterBoard allows you to customize the appearance of your jailbroken iOS device and install third party themes. You can only get Winterboard from Cydia (on jailbroken iOS devices).
You can find this app in Cydia - Tweaks. You can setup your Lockscreen, Homescreen or both with weather, calendar, news, clock, date, message, missed cals,.... It is free for trial 14 days. Costs aprox. 7 USD.
Springtomize gives you an all-in-one settings page for tweaking the homescreen the homescreen of your jailbroken iPhone. You can disable elements you don't use, or customize the look of the icons, the dock, the folders, the status bar, and the lock screen.