You could try iddeals.com. I use it when nonrevving. It shows loads/forecasted loads and will list connections as well. Costs like 5 or 6 bucks a month.
Only downside about the connections that it shows is that each routing stays on one airline from start to finish. No itineraries are suggested that utilize interlining. You would have to manually look up each leg if you needed/wanted to change airlines along the route, which isn't hard, but still involves an extra step.