The link below is a review that was posted today on Panbo about a free weather routing app called FastSeas that also allows you to input your own polars and vessel performance preferences. It looks pretty cool, but I haven't used any routing program before so I'd be curious what others who are familiar with them think about this one.
http://www.panbo.com/archives/2016/...y_free_fastseas_weather_routing_can_help.html
http://www.panbo.com/archives/2016/...y_free_fastseas_weather_routing_can_help.html