AdBlocker
AdBlocker is an easy to use and powerful tool, similar to extensions for your desktop browser. It blocks image based ads in Safari and other apps which are using web browser views (UIWebViews).

Firewall iP
Firewall iP acts as a Firewall for outgoing connections of your apps. It makes sure your privacy and your device’s security are protected by giving you the chance to block outgoing connections. You can easily create rules based on hostnames, IP addresses and ports. Firewall iP is a very advanced and useful security tool.

ScreenDimmer
ScreenDimmer gives you full control over the display dim time and can turn off the display after a predefined time interval.
Most users suffer unnecessary battery drain while having their iPhone not on standby. Setting auto-lock to a short time makes it better, but is an inconvenience most of the time due to permanent locking and unlocking while waiting for something.
ScreenDimmer is the solution for this problem: Save battery life by reducing the backlight to a minimum if the device hasn’t been used for a pre-defined time and reduce the waste of the most energy consuming component, the backlight, of the iPhone or iPod.

Tags: cydia, tweak, Yllier