Antigravitation Engine Site
- Describes Chinese theories, experiments and data analyses of an antigravitation engine and the related phenomena.
- http://xczhx.c59.zgsj.com/indexEnglish.htm

Gravitational Propulsion Research
- Yahoo group covering news, science but also fiction.
- http://tech.groups.yahoo.com/group/gravitationalpropulsionstevenson/

An Advanced Interstellar Propulsion System
- A site detailing a unique and novel method for exploring extreme distances in space.
- http://www.ovaltech.ca

Unproven Space Concepts
- A collection of works aimed at the conquest of space. Including laws on motion, energy and time plus a design for an interstellar spacecraft.
- http://krism.idx.com.au

Theory for Gravitic Propulsion
- A theoretical discussion of using gravity as a means of interstellar space propulsion. Touches on the theories of matter, energy, and space time.
- http://members.shaw.ca/mike.anderton

Gyroscopes As Propulsion Devices
- Gyroscope based technology could provide an alternative form of propulsion.
- http://www.gyro-scope.co.uk/

Field Resonance Propulsion
- Postulates magnetic/gravity interactions.
- http://www.keelynet.com/energy/holt1.htm