National Documentation Center
- Backbone organization of the national infrastructure for scientific documentation, online information and support services on research, science and technology. Includes profile, databases, and news.
- http://www.ekt.gr/

National Hellenic Research Foundation
- Established by Royal Decree on 9-10-1958 with the aim of the organization, the financing or the material or moral support of scientific research projects at the highest level.
- http://www.eie.gr/index-en.html

Hellenic-American Union
- A non-profit cultural and educational organisation offering courses in Modern Greek.
- http://www.hau.gr

National Observatory of Athens
- Extensive information on astronomy, climate, earthquakes.
- http://www.noa.gr/

Institute for Language and Speech Processing (ILSP)
- Founded in Athens, under the auspices of the General Secretariat for Research and Technology (Ministry of Development) with the aim to support the development of Language Technology.
- http://www.ilsp.gr/

EKKE
- National Centre for Social Research
- http://www.ekke.gr/

Athens Montessori School of Greece
- A Montessori preschool and elementary school, situated in a northern suburb of Athens. There is a formal permission from the Ministry of Education in Greece to use the Montessori system.
- http://www.montessori.gr/

American Educational Services
- Offering help with everything from camping and study tours to full time enrollment in American Universities and everything in between.
- http://www.forthnet.gr/aes/