Alliance CAD System are EDA tools for VLSI design.

ASCO project aims to bring circuit optimization capabilities to existing SPICE simulators.

Balsa Asynchronous Synthesis System is a circuit synthesizer.

CAM Expert it converts drawings (DXF) to virtually any NC code / g-code.

Confluence System Design Language is a language for reactive system design.

Dolphin Smash is a mixed-signal, multi-language simulator for IC or PCB designs.

Eagle is an eagle EDA software for Linux.

Easy Funktion is a 2D function plotter and equation solver.

Electric is a complete EDA system that can handle many forms of circuit design.

Electronic Design Automation - Index is a web-based index system that can keep track of your sch/pcb/fp/pl numbers.

Electronic Engineering Tool is a web-based tool with an electronic formula calculator and converter functions.

Electronics Optimizer is an electronics design tool for advanced optimization and design of electronic circuits.

Gaphor is a UML modeling tool.

gEDA is an collection of tools which are used to make electrical circuit design.

Gerber Viewer is a free Gerber viewer.

GerbMerge is a panelizing program for printed circuit boards.

GEZEL is a language and open environment for exploration, simulation, and implementation of cycle-true hardware models.

Greensocs is a development kit for producing systems on a chip using SystemC.

gResistor is a Gnome resistor color code calculator.

GTKWave is a wave viewer for Verilog/VHDL simulation.

HDLmaker is a Verilog/VHDL code generator and FPGA development system.

J-EAI is an XMPP-based Enterprise Application Integration (EAI) platform.

KTechlab is an IDE for microcontrollers and electronic circuits.

LedaX is ment to be an EDA including a Library Editor, Schematic Capture and PCB Editor.

ngspice is a circuit simulator derived from the Berkeley's spice 3f4(5).