Muzzy - it’s a tiny and gorgeous iTunes companion that lives on your menu bar. For Mac OSX, its free!
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
SpotiMy - Play/Pause and Next/Previous functions for Spotify directly on your Menu Bar!
WhosCall - WhosCall is a reliable caller ID app whose popularity has led to its adoption by many users including international media. You can now manage the numbers calling you regardless of whether they are part of your contact list or not... read more.
Bowtie - Bowtie is a desktop accessory that allows you to see and control your music (iTunes, Spotify...
CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.