Download of LAquis 4.1 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions among LAquis users are 4.1, 3.7 and 3.1.
Aq.exe and OPCLAquisServidor.exe are the most frequent filenames for this program's installer. The program lies within Education Tools, more precisely Science Tools. The actual developer of the free software is LCDS. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
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.
You may want to check out more software, such as SCADA LAquis, which might be similar to LAquis.