Del.icio.us is a bookmark - sharing community.
Everything posted to del.icio.us is publicly viewable by default, although a user can mark specific bookmarks as private, and imported bookmarks are private by default. The public aspect is emphasized; it is not focused on storing private ("not shared") bookmark collections. Many people use the del.icio.us linkrolls, tagrolls and network badges to display their links and information on their weblogs. Others use the RSS feeds and "daily blog posting" feature to do this.
del.icio.us has a "hotlist" on its home page and "popular" and "recent" pages, which help to surface interesting content and make the website an effective conveyor of popular internet memes and trends.
Use of del.icio.us is free.
1.Online software that takes minutes or hours to create instead of days and weeks.
2.End-user guided assembly in the browser.
3.Sharing via simple URL.
4.Leverages the global SOA: Is open to all external sources of behaviour and data, e.g. Web Services and other Web apis.
5.Visually configured or scripted "glue" to connect widgets and DIVs together.
6.Is secure, safe, and reliable.
7.What kind of user management it provides?
8.Is it open source?
The source code of the site is not available, but a user's own data is freely downloadable through the API in an XML or JSON format, and can also be exported to a standard Netscape bookmarks format.
API is open