For overnight shipments that won't fit in an envelope, there's FedEx Freight. The company, a subsidiary of delivery giant FedEx, provides less-than-truckload (LTL) transportation services throughout the US, Canada, and international points. (LTL carriers consolidate freight from multiple shippers into a single truckload.) Unlike traditional LTL carriers, it operates an integrated, nationwide pickup and delivery network for priority and economy, in all lengths of haul, through some 370 terminals. Sister company FedEx Custom Critical services time-specific, critical shipments.