After thinking about this question for a couple of minutes, I figured it has to be Spotify. I listen to music at home, on the way to work and at work as well and it's just so convenient to have it all in one place, whether it's on my phone or computer.
From the professional standpoint, it would have to be https://brand24.com. It's a web monitoring tool I use alongside TweetDeck. As a community manager and a marketer, I need to stay on top of all relevant brand and industry mentions on social media and any other places online, and the tool keeps me alert at all times.
