archthegreek,
While we cannot provide you with advice on which companies to look at more closely, we are more than happy to provide you with a simple guide to using the AGORACOM website.
The best way to browse companies listed within our website is to visit the 'Marketplace' which can be accessed by clicking on the following link:
http://www.agoracom.com/marketplace
The Marketplace page gives you the ability to sort companies by industry as well as exchange.
Companies with logos next to them are AGORACOM clients, while companies listed on the bottom of the page without logos are non-AGORACOM clients.
Regards,
AGORACOM