Spotify - Map shows when two people play same song at same time
Streaks - The to-do list that helps you form good habits.
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Taskful - Deadlines, meet your match.
SoundCloud - Enjoy music & follow favourite artists
ToDoList - Windows desktop application to stay on top of your daily tasks.