There are 2 repositories under smith-chart topic.
Fast, interactive Julia/GTK+ plots (+Smith charts +Gtk widget +Cairo-only images)
Parametric analysis/visualization of model/measurement/simulation results
This is a collection of open source, free to use and/or abandonware tools for Amateur radio.
Designing Amplifier based on S-parameters
Graphical Impedance Matching and Smith Chart - cloned from floppy drive source
A quick start Blazor server project that let you know how to create and configure the Syncfusion Blazor Smith Chart using Visual Studio 2019.
A quick start project that shows how to create and configure the Syncfusion Vue Smith Chart component in a Vue application. This sample explains how to populate list data, add legends, and enable data labels and tooltips.