The Free Version has only 8 Rules, but still interesting ...
That's true, but there are some pretty important rules in there - rules that can save designers big problems down the road. For instance, "Nets Crossing Gaps" can quickly identify reference plane breaks for all the nets in a design. And, of course, if you want more rules or you want to customize rules, we can help with that too. :-)
Try them out and let me know what you think! Free download.