KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
EasyEDA - EasyEDA - Web-based EDA suite; runs in browser.
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
AutoCAD Arch - Design and document more efficiently with the AutoCAD Architecture toolset, created specifically for architects.