SpaceX

Dragon is the first commercial spacecraft to deliver cargo to the International Space Station and currently the only cargo spacecraft flying capable of returning significant amounts of cargo to Earth. Dragon accommodates pressurized cargo in the capsule as well as unpressurized cargo in its trunk.
The racks are a honeycomb carbon-aluminum construction designed for efficient packing in a zero-gravity environment. They accommodate a variety of standard-size NASA cargo bags as well as freezers for carrying materials such as biological samples.

Dragon was designed from the outset to fly humans to space. Under an agreement with NASA, SpaceX is making upgrades to Dragon to allow for crew carrying capability.
Dragon will be the world’s safest and most reliable crew transport vehicle, with seating for seven, life-support systems, controls with manual capability, and a powered launch escape system.
Upgrades to Dragon are currently in progress. Dragon’s first manned test flight is expected to take place as early as 2018.

DragonLab is a free-flying, unmanned platform designed for research and testing in a microgravity environment independent of the International Space Station.
It can transport payloads, experiments, instruments, and sensors into space and back to Earth on missions ranging from one week to two years.
DragonLab can readily accommodate instrument and sensor testing, space physics and relativity experiments, radiation effects research, and many other microgravity tests.

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