Accubattery - Monitor's battery capacity through the use of science

Magic Playlist - Get the playlist of your dreams based on a song

BatteryCare - BatteryCare - Application and good practice guide for maintaining and optimizing the battery of the modern laptop

Playlist Machinery - Tools that help you create & organize your Spotify playlists

Greenify - Greenify is a mobile app that gives you greater control over your Android device's power usage, allowing you to get a lot more mileage out of your battery life without having to constantly plug it back into a charger.

Spotify.me - Beautiful analytics on your Spotify listening habits 🎧