In addition to the in-built devices, the accessories and the optional extras, a variety of load-securing aids are available commercially. Here are just a few examples:
Holed rails, lashing rails, lashing belts
Shoring bars, restraint bars, wall-to-wall locks (the latter for pickups/tippers only)
Wooden bracing elements
Dunnage bags (air bags), bolsters, empty pallets
Nets and tarpaulins
Slip-resistant materials (e.g. friction mats)
Edge guards and sliders
Brooms for sweeping the load floor (to increase friction)