This is a free (activation required at no charge) PCB design alternative and is available from the Design Spark website. These are the sample people who sponsor the chipKIT Challenge.
As Design Spark describes it:
Free from practical constraints on board size, pin counts, layers and output types, DesignSpark PCB circuit design software can be used for schematic capture, PCB design, layout and generating manufacturing files. Multi-page schematic designs are supported and gerber (extended) file outputs allow the designer to choose who will manufacture the board.
DesignSpark PCB allows you to generate all the files required to take your project from circuit diagram to layout schematic to a circuit board built project. Gerbers (Extended RS-274-X), Excellons, BOMs, component lists and positions are possible along with DXF (import and export) and IDF for interfacing to mechanical CAD software tools.
via Dangerous Prototypes
February 20, 2012