One of my favorite jailbreak tweaks that always comes in handy is CyDelete. Put simply, it allows you to uninstall Cydia packages from the Home Screen just like you would uninstall an AppStore app. The default way of uninstalling Cydia packages is via Cydia, but this makes it a breeze.
Springtomise is probably one of the best tweaks ever. It puts about 50 different tweaks into one package. From docks to screenshot modification, from status bars to the Lockscreen, Springtomise can change just about everything. It’s available in Cydia for $2,99 which is a good price for what it offers.
Winterboard is an application developed by Jay Freeman (The creator of Cydia.)
It allows you to theme your device. From Icons to status bars, from the lockscreen to the power-off screen, you can do pretty much anything in Winterboard.
In Cydia, there are thousands of Themes for Winterboard. You can simply install any theme and Winterboard will also install. Once you are ready to set it up, launch Winterboard from the SpringBoard (home screen).