Jacob Schweitzer

There is an admin section Options -> BP Profile Tabs where you can change the jQuery UI Theme, the default is cupertino.
Any of the themes available at http://jqueryui.com/themeroller/ can be used for the tabs, it loads either Google or Microsoft hosted jQuery UI theme CSS.

BuddyPress Profile Tabs

Great Plugin

BuddyPress Profile Tabs is a plugin that uses the Profile Groups provided in the BuddyPress options to make nice looking tabs using the jQuery UI.

Tran Bang

Enables adding a date field for Contact Form 7 WordPress Plugin using jQuery UI\’s 
autocomplete
Requires Contact form 7 4.2 or higher

Contact Form7: Autocomplete

Enables adding a date field for Contact Form 7 Wordpress Plugin using jQuery UI\'s autocomplete Requires Contact form 7 4.2 or higher

BuddyPress Profile Tabs vs Contact Form7: Autocomplete