yonisink

Create a WordPress menu (up to three levels) with the WP appearances built-in menu builder and convert it to a nice responsive dropdown using template tags.
Choose your colors, and whether you want a hover or click (click will be permanent on responsive break due to mobile devices’ use of hover as a “pre-click”).

Sinking Dropdowns WordPress

Convert default WordPress menu to a responsive hover/click dropdown menu.

etruel

Show a HTML code when you place the [WPeBanOver] shortcode, on mouse (over, out, click, dblclick) show another HTML code until mouseout, anywhere in your template, post, page or widget.
You can read, follow, donate and comment about this plugin at author page: <a href="http://www.netmdp.com" rel="nofollow ugc">netmdp.com</a>

WPeBanOver

Show a small banner and on mouse event (over, out, click, dblclick) show another big or 2nd banner anywhere in your template, post, page or widget.

Sinking Dropdowns WordPress vs WPeBanOver