The zLAS I/O Library is a C++ runtime library that provides API access for reading and writing zLAS as well as converting between zLAS and LAS. It is comprised of a header file documenting the function interfaces, a lib file, and a DLL. Third party developers can use this to add support for zLAS to their applications. The library has an Apache 2.0 license which permits use and redistribution at no cost.
The library is available on GitHub: https://github.com/Esri/esri-zlas-io-library