Alex (Shurf) Frenkel

A widget to add Gravity Form in dialog popup, has an option to add a delay, a position, and an introduction page.
From version 0.3 can be opted in/out to work ont he homepage. 
From version 0.5 you can use a button to open the popup. 
From version 0.6, added an option to show the popup only ones in X views (random generated) – Requested by .
<h4>Under the hood:</h4>
<ul>
<li>Built on Gravity Form 1.5.2, and uses it for working.</li>
<li>jQuery UI added from WordPress itself</li>
<li>Uses jQueryUI CSS</li>
</ul>
Enjoy using Gravity Form Popup Widget? Please consider <a href="http://alex.frenkel-online.com/donate/" rel="nofollow ugc">making a small donation</a> to support the software’s continued development.

Gravity Forms Popup Widget

A widget to add Gravity Form in dialog popup, has an option to add a delay, a position, and an introduction page.

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.

Gravity Forms Popup Widget vs BuddyPress Profile Tabs