LinkedIn: Emerging as one of the best networks for headhunters who have offered nice professional roles to the LinkedIn registered candidates, an app from them was a necessary one for people who are on the go. This application puts your professional network just a click away. You could walk into any interview or meeting with the ability to connect to over 100 million users all over the world. Keep the messages and updates from your network and the update status in real time. The app gives you the option to view, manage connect with people you might know or want to make connections with.