Free download a set of CSS3 Drop Down Menus with free license. This menu can be used for personal or commercial use without attribution. Simply don't add a "naughty attribution". That's all :D
But because it uses CSS3, please make sure that you have to consider about browser supports.

All of the menu effect are come from CSS Transition. ie-support-html5.js required to ensure that Internet Explorer can read the <nav> tag.

Sorry, I don't have much time to make all the demo page because it's so boring I think. Moreover each of them look similar right?