Thalamus is a database of all advertising companies & publishers in the world

Thalamus  is a database of all advertising companies & publishers in the world, with data & contacts for over 50,000 vendors across the globe Best of all - it's 100% free.
 Thalamus provides a discovery engine and review platform for online advertising. The Company houses a comprehensive dataset of ad partner capabilities, contacts, marketing collateral, ad specs, network data and marketer reviews for vendors across the globe.
visit them www.thalamus.co