Widgets
AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget

Advertising
TrafficStars provides top notch monetization and media buying solutions for advertisers and publishers Join TrafficStars to get high quality traffic or monetize your website at the best rates Sign up now for free

Ecommerce
The World Wide Web Consortium W3C develops standards and guidelines to help everyone build a web based on the principles of accessibility internationalization privacy and security