iGO8 is the European version of OnCourse Navigator.
OnCourse Navigator can be purchased here.
http://www.buygpsnow.com/oncourse-navigator_64.aspx
Here is the OnCourse Navigator home page:
http://www.oncoursenavigator.com/
I have no relation, it was the first that google popped up.
Some people use the term iGo8 because it was made available through "other" sources first and they installed it on their systems to see if they liked the software before making a purchase. I'm not agreeing nor disagreeing with this methodology, merely stating fact.
Depending on your google-fu you may be able to locate these alternative sources if you desire. But no, it isn't free.