AVG Privacy Fix is such a great app.  I love how it is a central hub that tells you all of your possible weak points of security within your social media accounts.  It shows you what information is vulnerable and gives you settings to quickly lock and privatize unnoticed public settings.  This is an app I got on my phone and will be there to stay.

Soundcloud is a site I'm very familiar with.  My band uses it all the time to get our music out in addition to iTunes and other music sharing platforms.  Soundcloud is great because it is a way of connecting fans with podcasts and music.