A must have tools for iPhone IOS

1. Zephyr
2. Activator -cydia
3. Barrel - for nice screen change.
4. xcon
5. Ncsetting
6.MultiStorey - double up your multitask
7. atom - easy access to app from lock screen
8. lockdown lite (bigboss) - cydia






Sources:

modmyi.com
cydia.xsellize.com


if you need more check them out here

http://gdeluxe.com/ios-6-0-cydia-tweaks-apps/