LibrePCB is a free EDA software to develop printed circuit boards. Key Features: Cross-platform (Unix/Linux, Mac OS X, Windows) All-in-one (project management, library/schematic/board editors) Intuitive, modern and easy-to-use graphical user interface Very powerful library design with some innovative concepts Human-readable file formats Open Source (GNU GPLv3)
FidoCadJ is a very easy-to-use editor, with a large library of electrical symbols and footprints (through hole and SMD). Drawings can be exported in several graphic formats (PDF, EPS, PGF for LaTeX, SVG, PNG, and JPEG). Although very simple and not relying on any netlist concept, FidoCadJ uses a file format containing only UTF-8 text, very compact and suited for copying and pasting with newsgroups and forum messages. This determined its success, being apt for simple mechanical drawings as well a
A full GPL'd suite and toolkit of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production. Currently, the gEDA project offers a mature suite of free software applications for electronics design, including schematic capture, attribute management, bill of materials (BOM) generation, netlisting into over 20 netlist formats, analog and digital simulation, and printed circuit board (PCB) layout.