Space Shuttle External Tank Applications
- Offers a collection of articles arguing for several applications and re-use of the tank.
- http://www.space-frontier.org/Projects/ET/

Space Island Group Project
- Features a project descriptions for building a space station devoted to tourism and 0-G experiments, based on the tanks of the space shuttle. Regularly updated.
- http://www.spaceislandgroup.com/

External Tank Manual
- Features extract from the shuttle reference manual.
- http://science.ksc.nasa.gov/shuttle/technology/sts-newsref/et.html

Re-using today's rockets spent fuel tanks in orbit
- Technical website
- http://www.permanent.com/ext-tank.htm

Studies
- Studies by L5 Minnesota (MN Space Frontier Society)- Uses for Shuttle External Tank in orbit
- http://www.freemars.org/studies/index.html