Images: Web 2.0 contenders

A personal organizer called BackPack from 37Signals is designed as a place to keep to-do lists, documents, photos and notes.

Jotspot is a hosted wiki service that allows businesspeople to share information, including text documents and spreadsheets, in a wiki format. The company's strategy is to offer pre-built applications, such as this class reunion site, on its wiki platform.

The last two years have seen an explosion in Web-based services aimed at consumers or small businesses. 30boxes is one of several companies offering hosted calendar applications. The service allows people to share their calendars, view others people's calendars and publish calendar information on blogs.

Netvibes is a portal site, like Microsoft's Live.com, that allows people to track blogs, see tagged photos and check e-mail from a Web browser.

Goowy offers hosted e-mail, calendar and contacts. It promises to let people upload documents, such as photos and music, from other sites. Goowy has an integrated instant messaging tool that allows messaging to different services on one page.