LAquis 4.1 can be downloaded from our website for free. The actual developer of the free program is LCDS.
From the developer:
SCADA tool and language for data acquisition, process supervision, industrial automation, storing, reports generation for quality management and applications development. Set tags (I/O points), equipment (modules, devices, PLCs, ...), variables, databases, customizable properties, visual interfaces, customizable reports until advanced processes through an SCADA script language oriented to industrial automation. Use visual objects to customize the SCADA software and create actions to the events through this language. It is possible to create drivers using its language. Some drivers are already included for free (ex: MODBUS). Includes a 3D interface transforming 2D factory plan into a 3D OpenGL interface with objects associated with tags.
You may want to check out more software, such as SCADA LAquis, which might be similar to LAquis.