There is a dedicated web page which I moderate, where all activities on astrobiology in Greece can be found: http://www.astrobiology.gr/
EANA is the European Astrobiology Network Association, of which I am a National Representative. Please, contact me for further information (i.e., if you want to be a member).
The COST Action ORIGINS (Origins and evolution of life on Earth and in the Universe) is a network of 28 countries, in which more than 80 scientists around Europe participate. In this Cost action, I am one of the two national representatives.