Gnome Power Mangement is a essential tool for power mangement on notebook and desktop. It has interesting options such as
- To suspend your laptop when the lid is closed.
- Power History (my favourite)
- Display Brightness
- Actions taken when power buttons or suspend buttons is pressed
- And so much more.....
KDE Power Devil is a lightweight laptop power management system designed for KDE4 Environment. According to the site, with PowerDevil you can set up preferences for lid Closing, Brightness, CPU scaling, Idle time, both when connected to AC and when on Battery.
Good news! KDE Power Devil is now compiled with KDE Core Releases and no longer as an external application