Browsing
Fundamental Web access tools: Browsers, extensions, widgets, and security.
Communications
Person-to-person communications platforms: E-mail, chat, voice.
Community
Online gathering places and group-powered content.
Data
Tools for finding online info, and storing and sharing files.
Entertainment
Tools for taking time off: Games and contests.
Media
Places to consume and share videos, photos, and music.
Mobile
Products that make your mobile phone a Web 2.0 appliance.
Productivity and Commerce
Sites for getting things done and doing online business.
Publishing
Tools for producing your own site: Blogging and Web content services.
Reference
Fonts of knowledge--from history to movies to maps.
