Aerofoil - Aerofoil extends Vista and Windows 7 notebook battery life by:
BatteryCare - BatteryCare - Application and good practice guide for maintaining and optimizing the battery of the modern laptop
Battery Mode - Replaces Windows default battery indicator to a more powerful and useful one.
Accubattery - Monitor's battery capacity through the use of science
BatteryBar - Track battery life with BatteryBar and BatteryBar Pro for Windows. Statistical calculations on past usage give BatteryBar increased accuracy.
Power Switch - SubiSoft Secure Folder - free software to hide, lock and encrypt folders