PCB Creator version 3 is a free PCB layout and schematic capture software for creating two- to four-layer boards. Features comprehensive differential pair toolkit, with both double- and single-track routing modes, as well as real-time verification of differential pair rules; Mac OS X compatibility support; real-time 3D preview and export, including more than 6,500 3D models; updated component and pattern editors, along with more than 130,000 components and 15,000 patterns; and customized hotkeys.

Bay Area Circuits, www.bayareacircuits.com  

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