SnapTap: Most of the users have a habit of using hardware buttons to click a photo, especially those who have recently adopted iPhone. This tweak lets you take photos with the iPhone’s volume controls and headset button instead of finding the small camera touch button at the bottom. Support iOS 4.x and iPhone 4 as well. Get your SnapTap tweak for $1.49 only.
iPicMyContacts: A simple tweak that shows contact pictures next to their names in your address book. iPcMyContacts comes very handy, when many of your contacts share same name (both first and last name). iPcMyContacts is available for $1.29 in Cydia Store via BigBoss repo.
LockInfo: It is one of the best jail-broken Cydia apps that provide functionality most anyone would expect would be available by default on their iPhone. LockInfo brings your calendar, e-mail, news, sports, weather, SMS notifications and missed calls to the lockscreen. LockInfo has now been updated with Retina Display.
28. Gridlock: It allows you to reposition springboard icons freely! You can move the icons in every possible way in the 4×4 layout throughout the Springboard, even allowing you to leave empty space. With Gridlock Cydia app you can arrange your springboard icons in order of how frequently they are being used or assigning rows to a particular category of apps on Jailbroken iDevice.
Synchronicity: This tweak lets you continue to use your iPhone or iPod Touch while you sync with iTunes. You can run apps, make calls, etc. but cannot run music app, as it might corrupt the data. Synchonicity Cydia app is available for $2.00 only.
and last but not least download infiniboard especially for the ipad