WinCC flexible 2007 was a mainstream HMI configuration software for Siemens panels (e.g., TP, OP, MP series) and PC runtime. It has since been succeeded by WinCC (TIA Portal).
Includes a PC-based runtime version for using industrial PCs as HMIs. How to Get a WinCC Flexible 2007 Download
: Often used for configuring SIMATIC Panels, SINUMERIK operator panels (PCU 50.3/70), and PC-based Runtime systems.