ZAP-fiX (ZPX) is a software solution that uses emulators and real devices to enable automated and manual cross-platform testing of mobile, desktop, and web applications on Windows, Mac, and Unix platforms. It integrates with HP test automation and management products like QuickTest Pro, LoadRunner, and Quality Center to provide device emulation and remote testing capabilities. ZPX is offered through various licensing models and provides training, support portals, and maintenance for its HP software integrations.