The X-34 is another technology demonstrator designed by the american company Orbital. This package also features a configurable Lockheed L-1011 "StarGazer" that can be used as the launcher for the X-34 or any other payload.

The X-36 is a technology demonstrator that shows some preliminary support for thrust vectoring. It's a very light, scaled down prototype of the real thing and as such it's not intended for long ranges.

This is a proposal for a russian military space station, heavily based upon Soyuz designs in the late 60s.