Is there a social media tool where I can search by a keyword and get posts and contact information of the person?

I'm looking to reach out to relevant people by being able to search for them on Twitter, Facebook, Quora and LinkedIn. Is there such a tool where I can get a list of people based on a keyword?

There are many tools to find prospects in your niche but you have to find their contact information separately.

Keep in mind that gathering contact information is a manual process which can easily be outsourced cost effectively. Give Amazon's Mechanical Turk or ODesk a try for gathering contact info.

For Twitter, there's Followerwonk and Twellow.

For Facebook, Quora, and LinkedIn, you don't need a tool. Their search functionality has everything you need to segment.