Although there may not be direct open-source equivalents to Indusoft Web Studio, exploring open-source HMI/SCADA tools can offer a cost-effective solution for certain projects.
Windows XP SP3, Windows 7 SP1, Windows 8/8.1, or Windows Server 2008/2012.
SVGA-minimum display, 2 GB free hard drive space, and an Ethernet/Wi-Fi adapter.