| Software Name | Platform | Best For | Free Tier | | :--- | :--- | :--- | :--- | | | Windows/Linux | Full PLC + HMI development | Unlimited 2-hour demo mode; runtime licenses optional | | OpenSCADA | Windows/Linux | Industrial SCADA | Completely open-source (GPL) | | Ignition Maker Edition | Windows | HMI/SCADA for non-commercial use | Free for personal/hobby use (no time limit) | | AdvancedHMI | Windows (.NET) | Visual Studio-based HMI | Open-source, fully free |
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