Taken from a Chicago Architectural Tour, the center building is called Aqua.
It is 82 stories tall, built in 2009. Every balcony is a little different.
The building at left is the Swisshôtel, 45 stories tall, built in 1989.
The building at right is the east face of the 303 East Wacker Building, 30 stories tall, built in 1977.