ExpressPCB is an educational and reference application for designing printed circuit boards (PCBs). The app provides a comprehensive suite of tools for designing and building custom circuit boards, from schematic drawing and design to production and assembly. It includes a powerful schematic editor, an integrated library of components, and a comprehensive set of PCB design and simulation tools. The app allows users to quickly create and validate their circuit boards, troubleshoot design issues, and visualize their circuits in 3D. ExpressPCB also provides a professional-grade manufacturing service for producing their designs.
Discontinued The program seems to be no longer updated. The latest version, 0.9.3b, released in June 2016, can still be downloaded from the official website.