Fresh gives your icons a cleaner, less-glossy look than what comes standard in iOS. It also comes with a basic gray background that helps to emphasize simplicity.
How to Install:
1. Jailbreak and install Cydia + Winterboard
2. Search Cydia for “Fresh” and install the theme
3. Open Winterboard and select Fresh
4. Tada! Your new theme should be working perfectly. You might need to switch into SummerBoard mode.