Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
FidoCADJ - FidoCadJ is a free user-friendly vector graphic editor for Mac OS X, Linux, Windows and Android.
CometCAD - Circuit schematic and layout editor program for Windows 2k, XP, Vista and 7
LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
JSchem - Free Cross-Platform Schematic Editor