I am currently looking for an image gallery CMS which is relatively simple.
I am looking for something that allows multiple-admin access.

I dont want a user login bar on the front page.

Currently I am testing ZenPhoto (www.zenphoto.org), but this does not offer multi-user capabilities as well as the thumbnails tend to get cut off..
http://asijarchives.toukyostudios.com/zenphoto/ (my test site)

My client is actually a school, and they don't want to pay for services like Smugmug.
I really love the ZenPhoto simple layout, but because they don't have some of the functions
it makes it hard for me to use the software.

Any ideas?

have you thought of using Joomla and a photo gallery component?

Here's an example of a site we developed using Joomla and the Expose component.

http://www.raleytropicalfish.com/com...pose/Itemid,3/

Here is a list of photo gallery components for Joomla.
http://extensions.joomla.org/index.p...1779&Itemid=35

OpenSourceCMS has some really great demos of some of the top CMS's and other web applications.

http://www.opensourcecms.com/

Gallery 2, great program