Qucs-S is a circuit simulation program with Qt-based GUI

Python tools for signal integrity applications

openEMS is a free and open electromagnetic field solver using the FDTD method.

openEMS is a free and open-source electromagnetic field solver using the EC-FDTD method.

A C++ library to describe geometrical objects and their physical or non-physical properties.

An open source multi-function instrument for everyone

Library for accessing the Hantek 6xx4 series USB oscilloscopes

Unofficial hanttek6004 android APP

DSP by FPGA

Evaluation board for the SX1255 RF transceiver chip

Unofficial mirror of HamClock sources

A simple DSP library and command-line tool for Software Defined Radio.

A simple DSP library and command-line tool for Software Defined Radio.

LiteX based M2 SDR/RF FPGA board.

NanoVNA‑X is a refined firmware for NanoVNA‑H/H4, introducing an event‑driven architecture, improved sweep stability, UI polish, per‑unit USB identifiers, and integrated SD features for reliable fi…

Web app spectrum analyzers for tinySA, RTL-SDR and SDRplay