Was having this discussion today... Seems like a lot of tower cranes are up right now. I wonder if there was a certain period where there was more than ever? I remember when Sundance was going up there were 3 in downtown (Cityplace, Westbrook and Commerce buildings) but don't remember how manyt the rest of the city had.
Currently (last updated 5/14/16)
Clearfork - 6
TCU Worh Hills - 2
NWRMC Garage - 2
Trinity Tower - 1
XTO Garage - 1
400 S. Jennings - 1
Hampton-1
Frost - 1
Total - 15
I know for sure Frost Tower has one on the way, and the Hampton downtown will aswell. Not sure if there's any more planned. And there may be some elsewhere (Alliance perhaps?) but I've not noticed.