BatteryCare - BatteryCare - Application and good practice guide for maintaining and optimizing the battery of the modern laptop
Aerofoil - Aerofoil extends Vista and Windows 7 notebook battery life by:
Accubattery - Monitor's battery capacity through the use of science
Battery Mode - Replaces Windows default battery indicator to a more powerful and useful one.
BatteryBar - Track battery life with BatteryBar and BatteryBar Pro for Windows. Statistical calculations on past usage give BatteryBar increased accuracy.
coconutBattery - With coconutBattery you are always aware of your current battery health. It shows you live information about the battery in your Mac and iOS devices (iPhone, iPad)