Here’s a listing, description and link to many of the social media websites.
Here are some others that are just hitting the market and many not be on the list above:
ooVoo – Video call with up to 12 friends. Send text, pictures and more…
Yik Yak - A live feed of what everyone’s saying around you
dubsmash - A video messaging social media application that lets you modify the sound track of your voice.