I was wondering if anyone knew about a plugin that is somewhat like what's on this site: http://www.512-k.com/. I wanted to make links or particular categories with sub links or categories that drop down in the sidebar. I don't want a plugin that does that and takes your blog categories. I'd like to be able to make my own. If that makes sense! Thanks in advanced!
Well the main links are in an LI, the sublinks will be under UL > LI tags, that is if you're writing valid HTML. You'll probably also need a basic AJAX/Java framework to achieve the effect of the sublinks showing after the click. That site is built using tables but you can check their javascript file at the link below; http://www.512-k.com/mainmenu_07.js (I'm no good with it, it looks like gibberish to me). Oh, to answer your question - I have no idea if a WP plugin exists.
maybe one of this plugins will help you http://wordpress.org/extend/plugins/wordpress-navigation-list-plugin-navt/ http://wordpress.org/extend/plugins/multi-level-navigation-plugin/ http://wordpress.org/extend/plugins/flexible-navigation/ for more go to http://wordpress.org/extend/plugins/ and search for navigation good luck