New plugins
Genesis Simple Headers lets you use the WordPress Appearance -> Header functionality to upload a custom logo or header for your site using the Genesis Theme Framework.
jQuery Slick Menu Widget creates sticky, sliding menu widgets from any standard WordPress custom menu using jQuery.
User Spam Remover automatically removes spam user registrations and other old, never-used user accounts. It also blocks the notification e-mail that WordPress normally sends to the administrator whenever a new user registers and logs it instead.
Updated plugins
AVH Extended Categories Widgets gives you multiple widgets for displaying categories. One is a replacement of the default category widget to allow for greater customization. The second is a Top Categories widget, which is only available in WordPress 2.8 and higher, and there is a third for displaying a new option called Categories Groups.
HubSpot for WordPress allows WordPress users to take advantage of HubSpot lead nurturing, website analytics, and assorted features of the HubSpot CMS that are missing in WordPress.
Jetpack supercharges your self-hosted WordPress site with the awesome cloud power of WordPress.com.
jQuery Vertical Accordion Menu creates vertical accordion menus from any WordPress custom menu.
The jQuery Slick Menu Widget looks quite nice. It looks like an easy way to add a little variety to the standard WordPress menus. Might need to be careful with the color choice though as some users might find them hard to see if they blend into the background. Nice find!