According to the Omeka web site:

Omeka is a free, flexible, and open source web-publishing platform for the display of library, museum, archives, and scholarly collections and exhibitions. Its “five-minute setup” makes launching an online exhibition as easy as launching a blog.

So, does that mean I can use it for my projects?

I plan to do an overview of Omeka, what you need to install it, how you can use it, how you can create web sites.

Omeka is widely used in the digital humanities. Come and see if it can work for you.