OK, this isn't complete, but I'm getting way behind, so I'm posting what I have so far.
Airship to Orbit
The technology is disclosed in
U.S. Patent Application Publication 2007/0205330, filed by Hubbard Aerospace, LLC, published on 6 September 2007 (it's attached to this post as a PDF, too). The premise here is that a semi-rigid dirigible type craft can be taken into orbit. The craft does not rely solely on lifting gases for lift, nor does it use conventional propeller-type drive, but uses a combination of lifting gas, lifting body shape, and turbojet engines that can draw air for combustion from reservoirs within the craft itself when outside air is too rarefied or simply unavailable.
Read more by clicking the title of the post.