FidoCADJ - FidoCadJ is a free user-friendly vector graphic editor for Mac OS X, Linux, Windows and Android.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.
JSchem - Free Cross-Platform Schematic Editor
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Splan - sPlan is a software to design your schematic circuit diagrams.