Vizu provides users with online opinion polling and market research services.

Nabbr is an online ad network and widget promotion network that specializes in reaching over 36 Million Gen-Y social net users.

comScore is an Internet information provider of consumer databases, internet audience measurement services, and research services from market sizing and analysis to customer satisfaction research.

Services include comScore Widget Metrix which provides reporting on worldwide widget usage, including audience size and usage by widget publisher and by individual widget, classification of the widget landscape into major content categories, and U.S. widget audience composition by age and gender.

Clearspring is a provider of cross-platform widget services. The company helps advertisers package, distribute, and analyze the performance of widgets via a single platform.

Gigya is a "social marketing solutions company" which assists advertisers in creating, distributing and tracking widgets on blogs and social networks.

The Paypal Storefront Widget enables users to create their own online store on their website or blog.

TrafficMagnets provide free, live dynamic traffic data for your surrounding area.

Bunchball helps website owners to improve user engagement. Their widgets, originally created for gaming, can be utilized for a variety of applications.

From Techcrunch

Weebly is a website development tool that enables users to "create pages with template skins and content widgets. Users can also "drag-and-drop content widgets like pictures, text, video and Google Maps in WYSIWYG-fashion. They also have a new blogging platform that can be added to the navigation bar of your personal Weebly page."

From Techcrunch

Blogfuse is a Facebook application that enables users to publish their blog's articles on Facebook, increasing the brand and "viral-ness" of their blog.

Via Techcrunch