Photography now
http://www.photography-now.com
Photography now is a website for Photography and Video Art. It offers an international directory of exhibitions and events.

artnet
http://www.artnet.com
artnet provides international online gallery directory. Its key services include online magazine with news and reviews of exhibitions and events as well as a price database with worldwide art auction results.

artinasia.com
http://www.artinasia.com
artinasia.com provides a comprehensive directory of Asian artists, galleries, shows and institutions. It updates shows and events from around the world regularly that focus on Asian contenporary art.