KiCad is widely considered the best overall free and open-source PCB design suite. It is a complete EDA (Electronic Design Automation) package that handles everything from schematic capture to 3D board viewing.

EasyEDA stands out for its web-based convenience and seamless integration with component suppliers like LCSC and manufacturers like JLCPCB.

Supports up to 32 copper layers, includes a push-and-shove router for efficient trace placement, and features a robust 3D viewer for mechanical fit checks.