Cydia Tweaks in Tweaks section by Recent Updates ↓
change the lockscreen's dimmer timer
VoiceMailBlock allows you to disable the voicemail button on the iPhone to prevent accidental press.
Toggle device from entering sleep mode.
Disables the lock screen intelligently.
For firmware 3.1+. Carriers which are officaly known to the iPhone database will show your carrier logo, otherwise it will try to show your carrier name instead. This package is only useful if you do not see currently ANYTHING in the top-left corner of SpringBoard. If you don't see an logo / see a wrong one, please install a Carrier Bundle for your operator (and don't ask me where to get one).
unclutter Safari's bookmarks menu
Reorganize your photos/videos
use external apps to place calls
finer time selection on Calendar events