TypeError: $(...).foundation, superfish and nivoSlider are not functions

I have 3 JavaScript errors on my wordpress site:

TypeError: $(...).foundation is not a function;
TypeError: $(...).SuperFish is not a function;
TypeError: $(...).nivoSlider is not a function

I read that it might be because the site is loading multiple jQuery libraries. It could be a noConflict issue or maybe that the function isn't being defined in the header. Unfortunately, I'm not savvy enough code-wise to adopt other people's solutions to my problem. I would really appreciate it if someone could look directly at my problem, and provide insight.

Here's a link to my site.

via Chebli Mohamed