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)
Accubattery - Monitor's battery capacity through the use of science
GSam Battery Monitor - Monitor your android devices battery usage.
BatteryMon - BatteryMon is a battery monitoring software solution.
DU Battery Saver - DU Battery Saver, get up to 50% more battery life for your Android phone. Battery Saver learns how you use your phone, then creates smart profiles that match your settings to your needs while getting more life from your battery.
BatteryBar Pro - BatteryBar Pro is software for windows that enables users to check their Battery performance and stats.