LasReport is a Windows command line utility for reporting information about lidar stored in LAS and Esri zLAS format files. It can send output to the screen as well as to a text file. It can also process all the LAS/zLAS files in a folder and write a separate report text file for each one.
The command line utility is free to use. It will work without need for other Esri software.
Link to app on resource center: LasReport Utility