Location: Chicago

What it does: Provides an online forum for job seekers and companies in search of new hires.

Description of internship: The company offers a variety of internship positions, ranging from marketing to engineering. Interns duties include conducting research, blueprinting potential clients, gathering data, writing press releases, building media lists, and analyzing market trends. (paid)

Notable perks: Massage chairs, game rooms, and Nintendo Wii -- need we say more? Interns are also invited to Wrigley Day, when CareerBuilder rents out the home of the Chicago Cubs for a softball tournament, the Taste of Chicago, and other company events.