CloudPlay for Mac is a simple application that lets you find songs in online services like YouTube, SoundCloud, exfm, BandSoup and even music in iTunes.
It also searches thousands of online radio stations and supports Last.fm scrobbling. You don't even need to touch your mouse or trackpad to activate it - CloudPlay for Mac allows you to assign a hotkey to activate it or you can use an Apple Remote.
From the menu bar, CloudPlay gives you access to your iTunes library but it will also search your favorite artists and save new playlists. CloudPlay can also display video clips if you choose a song from YouTube. Cloudplay is free to use until it it out of beta but when CloudPlay reaches the Mac App Store, the beta version will expire 30 days later.
CloudPlay is an interesting application for anyone that regularly uses YouTube, SoundCloud and iTunes for their music needs.