Where to find the goodies?

Where to find the goodies?

Friends:

I teach a few introductory courses in Dreamweaver at a small regional university. We just changed books and I bumped into a lovely routine called Lightbox based in JQuery. I suspect the readers of forum are familiar with it.

 My question is where do I go to find all the other JQuery libraries that are offered free and would be a practical use to developers in their first year or two of constructing Websites? 

I'm not looking for a specific site that might do "X", since I literally don't know what I don't know.

Thanks,

Dr. Richard Rose
West Texas A&M University