Displays the status of your laptop’s battery
An Intelligent BAttery Monitor
A replacement of the speedstep applet you can find in Windows.
PowerTop detects which Linux programs and kernel tunables are resulting in the largest power consumption and use of battery time
KPowersave is a KDE frontend to powersave.
Sleek Monitor is a combination of basic monitors for OS, KDE, Kernel, CPU & cache, GPU & GPU Temp, Memory, Wired & Wireless, etc
Powersave project is a powersave daemon for laptops.
wmbatteries is a dockapp based on wmacpiload.