OmniGlyph is described as '(CIRCAD) is a powerful and easy-to-use PCB Design package. Included within one clean and simple program are ample tools for all aspects of circuit design and manufacturing' and is an app in the Education & Reference category. There are more than 25 alternatives to OmniGlyph for Windows, Mac, Linux, Online / Web-based and Android. The best alternative is KiCad, which is both free and Open Source. Other great apps like OmniGlyph are Fritzing (Paid, Open Source), LibrePCB (Free, Open Source), Autodesk EAGLE (Free Personal) and OrCAD (All Products) (Paid).
The gEDA project has produced and continues working on 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.