KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Procore - Procore is the world's most widely used construction project management software. Easy to use, mobile platform with unlimited user licenses.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
BuilderTREND - Buildertrend is the #1 construction management software and construction app for home builders, remodelers, specialty contractors and commercial construction.
QUCS - Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.
CoConstruct - CoConstruct's project management software helps custom builders & remodelers coordinate projects, communicate with clients & crew, and control.