ASTROnet
- Section of Astrophysics, Astronomy and Mechanics, Department of Physics, Aristotle University of Thessaloniki; includes reports, conferences, lectures, and links.
- http://www.astro.auth.gr/

Arcturos
- Non-profit civil company focusing on the protection of the Brown Bear; find out about activities, events, and volunteer opportunities.
- http://www.arcturos.gr/