Cargo Bikes

Not a cargo bike but a new trailer from a French company called FlexiModal.

From their site:
Designed around a frame making lever office, BicyLift allows the lifting and removal of the load to be transported without additional energy input that the weight of the operator. This principle subject to a patent (No. 1,561,087) can lift 180 kg with ease and reliability.

Characteristics

• lift capacity: 180 kg
  
• format supported: pallet / pallet box size 1.20 × 0.80 m
  
• unladen weight: 25 kg
  
• Overall Width: 1.15 m
  
• Chassis: steel and aluminum
  
• wheels: 20px2.15
  
  

More info and a video on the site.
http://fleximodal.fr/