Xnec2c is a high-performance multi-threaded electromagnetic simulation package to model antenna near- and far-field radiation patterns for Linux and UNIX operating systems.

Fast, interactive Julia/GTK+ plots (+Smith charts +Gtk widget +Cairo-only images)

NanoVNA RF learning board with SMA connectors for practical demos, experiments, and teaching.

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.

RF matching network synthesizer, optimizer, and S-parameter analyzer with live VNA control

CAD tool for designing RF and microwave circuits.

Smith Chart

GTK4 Drawing Area widget displaying a detailed Smith chart

Graphical Impedance Matching and Smith Chart - cloned from floppy drive source

Local antenna and RF plotting app for HFSS, CST, ADS and VNA data, with S-parameters, radiation patterns, Smith charts and publication-ready exports.

Designing Amplifier based on S-parameters

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.

Python wrappers for RF lab instruments — Mini-Circuits USB power sensors and Agilent E5061B ENA — with FastAPI servers for n8n and a live Smith chart viewer.

Interactive Smith chart learning app with Touchstone analysis, impedance matching, and linked RF plots.

Interactive, accessible Smith chart for lossless single shunt-stub impedance matching—entirely browser-based.

Yet Another BAsic Smith Chart gizmO

Circuit ⇄ Transfer Function Studio — a free, offline, browser-based studio for circuits, control systems, and RF/microwave design. Live at eerflab.com

A quick start Blazor server project that let you know how to create and configure the Syncfusion Blazor Smith Chart using Visual Studio 2019.