imo messenger (Free)
You can make voice calls and have instant messaging chats for free with the imo messenger app. It also works as a consolidator so you no longer have to dip in and out of Facebook Chat, Skype, Google Talk, and other services in order to catch up with everyone. You can simply add your accounts to imo. It has a clean interface that makes it easy to use and your entire chat history is fully searchable. You can also use it for group messaging and sharing photos or videos.