Xyce Alternatives

Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.

Ngspice is a mixed-level/mixed-signal circuit simulator.

LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.

A Cross Platform and Open Source Electronics Design Automation Suite

Qucs-S is a spin-off of the Qucs cross-platform circuit simulator.

KTechLab is an IDE for microcontrollers and electronics.

LibrePCB is a free EDA software to develop printed circuit boards.

Solve Elec is a free educational program to draw and analyze electrical circuits.

Digital Electronics Education and Design Suite

Upverter makes it easy to design and share electronics on the web.

Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...

A virtual simulation environment for electronic circuits with support of digital and analog devices.

Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...