Wattagio is powerful battery assistant. It informs you about current battery health and helps to decrease power usage. Flexible settings in the application give you options to customize your profile to meet your needs.
Battery Health 3 for Mac is a professional battery monitoring utility for viewing vital statistics about your MacBook's and iOS device's battery, such as power level, heath, capacity, temperature, charge cycles and more.
Greenify help you identify and put the misbehaving apps into hibernation when you are not actively using them, to stop them from lagging your device or leeching the battery, in a unique way! They can do nothing without explicit launch by you or other apps, while still preserving full functionality when running in foreground.
Battreminder is a light-weight minimal browser extension, which lets you track your laptop's battery level and reminds you with a sound notification when the battery is fully charged!